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Predictive coding

Subclass of:

382 - Image analysis

382232000 - IMAGE COMPRESSION OR CODING

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DocumentTitleDate
20110176741IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - The present invention relates to an image processing apparatus and an image processing method capable of performing weighted prediction on the basis of local characteristics of an image.07-21-2011
20080260269Repetition and Correlation Coding - A method for compressing image data of an image wherein a difference between each element and a previous element is calculated (10-23-2008
20110194784ENCODING AND DECODING WITH ELIMINATION OF ONE OR MORE PREDETERMINED PREDICTORS - A method is provided for encoding an image or a sequence of images generating a data flow comprising data representing a group of pixels in one of said images, said method including: calculating a predetermined number of predictors in relation to said group of pixels, and selecting an optimal predictor in accordance with a predetermined selection criterion. Between the calculation and selection steps, a step of eliminating at least one predictor with a calculated predetermined number is performed, which comprises, for at least two i08-11-2011
20110194783Systems and Methods of Inter-Frame Compression - A system and method for rendering images, and performing operations such as windowing and leveling, when the parameters of a client appliance are known and rendering images when the parameters of a client appliance are unknown. The invention also considers the rendering from the client appliance perspective and the server appliance perspective.08-11-2011
20130077885IMAGE CODING APPARATUS AND IMAGE CODING METHOD, AND IMAGE DECODING APPARATUS AND IMAGE DECODING METHOD - The data amount of coding data is to be reduced by using a larger block.03-28-2013
20130077886IMAGE DECODING APPARATUS, IMAGE CODING APPARATUS, IMAGE DECODING METHOD, IMAGE CODING METHOD, AND PROGRAM - The present invention relates to implementation of efficient decoding and coding of an image. A plurality of variable length decoding units 03-28-2013
20100046848Compression For Holographic Data and Imagery - Image pixel intensity data is transformed to a holographic representation of the image. A subset of the holographic representation is modeled. Model parameters constitute a compressed image representation. A two-dimensional Fourier transform can be applied to obtain the holographic image. Modeling includes applying an analysis portion of an adaptive analysis/synthesis prediction methodology to a subset of the holographic representation. Linear prediction can be the adaptive analysis/synthesis prediction methodology. Prior to modeling, one-dimensional Fourier transform can be performed on the holographic representation and the linear prediction is one-dimensional. Model parameters are preferably quantized. Embodiments include determining error between the model and the model's input data. There the compressed image representation the error, which also can be quantized. The subset of the holographic representation can be less than all the representation. The subset can be a plurality of complete rows; preferably substantially symmetric about 0 Hz.02-25-2010
20130039595IMAGE PROCESSING SYSTEM, IMAGE PROCESSING METHOD, AND PROGRAM - It is an object to reduce a computation related to a detection of a corresponding point intended for a compressed dynamic image. In order to attain the object, there are acquired first and second compressed dynamic images including a reference frame and a prediction frame with each pixel indicated by motion information based on the other frame respectively. Moreover, there is executed a detection processing for detecting a corresponding point which corresponds to each reference point of one frame contained in the first compressed dynamic image from one frame contained in the second compressed dynamic image by causing each set of frames between said first compressed dynamic image and said second compressed dynamic image to be a target. The detection processing intended for a set of prediction frames is executed by using the motion information indicative of the set of prediction frames.02-14-2013
20130136374METHOD AND APPARATUS FOR ENCODING THAT INTRA PREDICTION BASED ON MODE OF VARIABLE SIZE PARTITION IS APPLIED IN MACRO BLOCK - A method for encoding that adaptive intra prediction based on a mode of variable size partition is applied in a macro block, includes calculating average values of the macro blocks to set the representative values of the macro blocks; and generating minor macro blocks by partitioning the macro blocks based on partition of the exceeded portion and calculating average values of each of the minor macro blocks and then, setting representative values of each of the minor macro blocks using the calculated average values. Further, the method includes generating minor macro blocks by partitioning the macro blocks based on partition of horizontal and vertical directions, calculating average values of each of the minor macro blocks and then, setting representative values of each of the minor macro blocks using the calculated average values.05-30-2013
20130089266METHOD AND APPARATUS FOR ENCODING/DECODING IMAGE DATA - Several attempts have been tried to improve the performance of intra-prediction in video encoding and decoding, which are targeting at pixel level parallelization. However, the prior art methods provide no solution for implementing an improved intra-prediction method on a parallel processing platform. The present invention uses estimated predictors instead of reconstructed exact predictors. This enables faster estimation of predictors, and allows an encoder to perform intra-prediction for all blocks of at least a portion of an image simultaneously. A method for encoding image data, a device for encoding image data, a method for decoding image data and a device for decoding image data are disclosed.04-11-2013
20130089265METHOD FOR ENCODING/DECODING HIGH-RESOLUTION IMAGE AND DEVICE FOR PERFORMING SAME - A method for encoding/decoding high-resolution image and a device for performing the same set the size of an extended macro-block as the size of a prediction unit to be encoded, according to a temporal frequency feature or a spatial frequency feature found therebetween at least one picture to be encoded, perform motion prediction and motion compensation using the set prediction unit size unit, and perform the conversion thereof. Also, a macro-block having 32×32 pixel or 64×64 pixel size is divided into at least one partition based on an edge, and encoding is performed on each of the divided partitions afterwards. Therefore, encoding efficiency for high definition (HD) or higher resolution images is enhanced.04-11-2013
20090034857IMAGE ENCODER AND IMAGE DECODER, IMAGE ENCODING METHOD AND IMAGE DECODING METHOD, IMAGE ENCODING PROGRAM AND IMAGE DECODING PROGRAM, AND COMPUTER READABLE RECORDING MEDIUM RECORDED WITH IMAGE ENCODING PROGRAM AND COMPUTER READABLE RECORDING MEDIUM RECORDED WITH IMAGE DECODING PROGRAM - An image encoder including: a predicted-image generating unit that generates a predicted image in accordance with a plurality of prediction modes indicating predicted-image generating methods; a prediction-mode judging unit that evaluates prediction efficiency of a predicted image outputted from the predicted-image generating unit to judge a predetermined prediction mode; and an encoding unit that subjects an output of the prediction-mode judging unit to variable-length encoding. The prediction-mode judging unit judges, on the basis of a predetermined control signal, which one of a common prediction mode and a separate prediction mode is used for respective color components forming the input image signal, and multiplexes information on the control signal on a bit stream, multiplexes, when the common prediction mode is used, common prediction mode information on the bit stream, and multiplexes, when the common prediction mode is not used, prediction mode information for each of the color components on the bit stream.02-05-2009
20120219232IMAGE ENCODING APPARATUS, IMAGE DECODING APPARATUS, AND DATA STRUCTURE OF ENCODED DATA - An image encoding apparatus of the present invention includes a TM prediction section (08-30-2012
20120219231METHOD OF COMPRESSION OF DIGITAL IMAGES USING A FIXED NUMBER OF BITS PER BLOCK - A method of compression of digital images using a fixed number of bits per block is described. Intra-coding is used for lossless compression of digital images. The image is partitioned into blocks with the same size. The encoder generates a fixed and predetermined number of bits for each block. The encoding process includes gamma conversion applied to the input image to generate data. Additional stages include prediction, quantization, DPCM, entropy coding and refinement.08-30-2012
20130071038IMAGE DECODING APPARATUS, IMAGE ENCODING APPARATUS, AND METHOD AND PROGRAM FOR IMAGE DECODING AND ENCODING - An encoded bit stream is processed by a lossless decoding unit (03-21-2013
20090092327IMAGE PROCESSING METHODS AND IMAGE PROCESSING APPARATUS UTILIZING THE SAME - An image processing method applied in an image processor for processing an image including first pixels each having a pixel value, a first reference pixel value representing a mean value of the pixel values of the first pixels, the pixel values of the first pixels being distributed within a first distribution range bounded between a second reference pixel value and a third reference pixel value. Second pixels are selected from the first pixels. The pixel values of the second pixels are distributed within a second distribution range. The second distribution range of the second pixels is smaller than the first distribution range of the first pixels. A local characteristic of the image is obtained according to the second pixels. A parameter of the image is adjusted according to the local characteristic.04-09-2009
20090092329Image processing apparatus and image display system - An image processing apparatus is provided. The image processing apparatus comprises a storage module, a processing module and an output module. The storage module is used for storing an image file. The processing module is coupled to the storage module for performing a coordinate conversion on the image file based on a predetermined manner to generate a converted file, and storing the converted file in the storage module. The output module is coupled to the storage module for reading the converted file from the storage module and processing it to output an image signal.04-09-2009
20090092328METHOD FOR MOTION COMPENSATION - A method for use in video compression is disclosed. In particular, the claimed invention relates to a method of more efficient fractional-pixel interpolation in two steps by a fixed filter (04-09-2009
20090268976Adaptive Area Of Influence Filter For Irregular Spatial Sub-sampled Images - A sample cell corresponding to a sample is computed to include pixels of an image according to sample cell criteria and shape. The sample cell shape and criteria define pixels to include in the sample cell. A target pixel cell corresponding to a target pixel includes pixels of the image according to a target pixel cell criteria defining which pixels are included in the target pixel cell. A sample filter coefficient is computed from pixels in the sample and target pixel cells. A filter tap corresponding to the target pixel is defined based on the sample filter coefficient. A tap extension corresponding to the target pixel is generated. The tap extension defines additional pixels of the image to be included in an extended target pixel cell according to a tap extension criteria. The extended target pixel cell includes pixel in the target pixel cell and the additional pixels. A tap extension filter coefficient based on pixels located in the extended target pixel cell and the sample cell is computed. Sample cell shape is varied according to sample cell shape parameters. An optimal filter weight for the target pixel is extracted from the sample filter and tap extension filter coefficients.10-29-2009
20090268975Sample Level Variation For Spatial Sub-sampled Images - A method for performing a sample level variation on an irregular sample is described herein. An initial sample level value for the sample is determined. An area of influence of the sample including pixels for which the sample is a factor in the prediction thereof is computed. Prediction errors of pixels in the area of influence are computed, along with a prediction error of the sample based on the prediction errors of the pixels. If the prediction error of the sample exceeds a prediction error threshold, a sample level change for the sample is computed based on only the prediction errors of the pixels. If the sample level change is less than a level change threshold, a new sample level value is assigned to the sample based on the sample level change.10-29-2009
20090268974INTRA-PICTURE PREDICTION MODE DECIDING METHOD, IMAGE CODING METHOD, AND IMAGE CODING DEVICE - Provided is a method and the like for reducing a processing amount required for deciding an intra-picture prediction mode in intra-picture prediction coding, while maintaining the coding efficiency at a certain level. By the method and the like, respective representative values of at least three regions included in a block to be coded are calculated. Then, a difference sum of at least two of the representative values positioned in a direction, and another difference sum of at least two of the representative values positioned in at least one direction different from the above direction are calculated. Next, from among intra-picture prediction modes, at least one intra-picture prediction mode in the direction where the difference sum is a minimum among the calculated difference sums. Thereby, it is possible to reduce the processing amount required for deciding an intra-picture prediction mode.10-29-2009
20130064464IMAGE CODING METHOD AND APPARATUS USING SPATIAL PREDICTIVE CODING OF CHROMINANCE AND IMAGE DECODING METHOD AND APPARATUS - A coding method including dividing pixels of a chrominance component of an input image into blocks having a predetermined size; selecting one among a direct current prediction method, a vertical prediction method, a horizontal prediction method, and a hybrid prediction method according to a user's input; generating a prediction value of each pixel in a current block to be predictively coded, using at least one pixel value among pixel values in an upper reference block adjacent to the current block and in a side reference block adjacent to the current block, according to the selected prediction method; generating a differential value between the prediction value and a corresponding real pixel value in the current block; and coding the differential value and information on the selected prediction method using a predetermined coding method.03-14-2013
20090238482Method and apparatus for field picture coding and decoding - A field picture coding/decoding apparatus and method is provided. The field picture coding method includes selecting a reference field with respect to an input image, generating a predictive image by deinterlacing with respect to the selected reference field, and performing predictive coding with respect to the input image using the predictive image.09-24-2009
20090238480RECORDING MEDIUM HAVING RECORDED THEREON CODED INFORMATION USING PLUS AND/OR MINUS ROUNDING OF IMAGES - A recording medium having recorded thereon information related to coded data of an image sequence; wherein the information related to coded data of an image sequence is a set of coded frame information of a plurality of frames of an image sequence; wherein the coded frame information includes: information related to a difference image between an image of a current frame and a prediction image of the current frame, the prediction image being synthesized by performing motion compensation, information related to motion vectors estimated in performing the motion compensation, and rounding method information specifying either a positive rounding method or a negative rounding method for interpolating intensity values of pixels in performing the motion compensation when the input image is coded as a P frame, wherein no rounding method information is included in the coded frame information when the input image is coded as an I frame.09-24-2009
20090046936METHOD OF COMPRESSING DIGITAL INK - A method of compressing a digital ink input including a sequence of strokes is provided in which each stroke is represented as a series of digital words representing x and y co-ordinates, at least one reference co-ordinate of each stroke is expressed in absolute terms, and a co-ordinate other than the at least one reference co-ordinate is expressed as an offset from a preceding co-ordinate. The co-ordinate other than the at least one reference co-ordinate is represented as a combination of an estimate determined from the previous m co-ordinates and a residual error value.02-19-2009
20090010554Method for Processing Image Data - In the method for compressing image data, a main block and it's sub-blocks are selected for processing and all sub-block groups and, finally, the main block to be compressed are processed in a fixed order starting from the lowest level blocks, i.e. blocks of level 1, whereby at the same time the status function is formed which is a series of numerical or status values depending in a certain way on the content of all sub-blocks of the main block. The original information of the blocks indicated by the status function is compressed into a small amount of values arranged in a certain way, and when decoding the image data, the original information of said blocks may be recovered at least approximately. In the encoding of each block of level 1, a threshold value and a quantization step may be defined and adapted in relation to each other or independently so that the relationship between the size and quality of the compressed image is optimal. The solution reduces especially the need of computing power in encoding and decoding image data.01-08-2009
20120114260IMAGE PROCESSING DEVICE AND IMAGE PROCESSING METHOD - The present invention relates to an image processing device and an image processing method whereby encoding efficiency of image prediction encoding can be improved.05-10-2012
20100086224DYNAMIC CLUSTERING FOR ADAPTIVE PREDICTION FILTERS - An initial value is assigned to a center point for each cluster in a plurality of clusters. Each point in a point space is assigned to a closest cluster based on the distance between the each point and the center of nearest cluster. A first-assignment value is determined for each center point using the clusters the points are assigned to. A first-assignment dynamic validity index of a current cluster configuration is evaluated. Each point in the point space is reassigned to the closest cluster based on the first-assignment value of each center. A second-assignment value is determined for the center of each cluster according to the reassigning. A second-assignment dynamic validity index is evaluated using the second-assignment values. The current cluster configuration is selected if the difference between the dynamic validity indices is less than a threshold.04-08-2010
20090074313Encoding Method, Encoding Device, Encoding Process Program, and Recording Medium on Which Encoding Process Program Is Recorded - The present invention is applicable to video cameras, for example. The present invention encodes input image data D03-19-2009
20110299789SYSTEMS AND METHODS FOR DETERMINING IMAGE REPRESENTATIONS AT A PIXEL LEVEL - Systems and methods process an image having a plurality of pixels includes an image sensor to capture an image; a first-layer to encode local patches on an image region; and a second layer to jointly encode patches from the same image region.12-08-2011
20110286679IMAGE ENCODING/DECODING SYSTEM - A picture prediction encoding device includes: a region division unit for dividing an input picture into a plurality of blocks; a prediction signal generation unit for generating a prediction signal with respect to a pixel signal that is included in a subject block to be processed among the blocks; a residual signal generation unit for generating a residual signal between the pixel signal of the subject block and the generated prediction signal; a signal encoding unit for generating a compressed signal by encoding the residual signal; and a storage unit for decompressing the compressed signal and storing the decompressed signal as a reproduced pixel signal. The prediction signal generation unit is configured to sub-divide the subject block into a plurality of small regions, at least one of the small regions is non-square, and a length of a first side of the non-square small region is longer than a length of a second side that is different from the first side.11-24-2011
20110007978Method Of Compressing Input Stroke Sequence - A method of compressing a sequence of strokes input at an input device of a processing system is provided in which each stroke input at the input device is represented as a series of digital words representing x and y co-ordinates, a reference co-ordinate of each stroke is expressed in absolute terms, and a co-ordinate other than the reference co-ordinate is expressed as an offset from a preceding co-ordinate by combining a residual error value and an estimate calculated from the previous m co-ordinates using the formula:01-13-2011
20080310743Optimizing Pixel Labels for Computer Vision Applications - Computer vision applications often require each pixel within an image to be assigned one of a set of labels. A method of improving the labels assigned to pixels is described which uses the quadratic pseudoboolean optimization (QPBO) algorithm. Starting with a partially labeled solution, an unlabeled pixel is assigned a value from a fully labeled reference solution and the energy of the partially labeled solution plus this additional pixel is calculated. The calculated energy is then used to generate a revised partially labeled solution using QPBO.12-18-2008
20090285499IN-PICTURE PREDICTION FOR VIDEO CODING - A method of coding video content. The method can include, identifying a first plurality of image blocks within a picture based on at least a first image characteristic that is common to each of the first plurality of image blocks. A first image block group can be dynamically defined. At least one of the image blocks can be selected as a predictor block to predict other image blocks within the first image block group. In another arrangement, at least a first image block and a second image block can be identified within a picture. The second image block can be predicted from the first image block. A displacement vector can be defined to associate the second image block with the first image block. A value representing the displacement vector can be included within a header of the second image block.11-19-2009
20090087110MULTIMEDIA CODING AND DECODING WITH ADDITIONAL INFORMATION CAPABILITY - A multimedia coding and decoding system and method is presented that uses the specific prediction mode to signal supplemental information, e.g., metadata, while considering and providing trade offs between coding performance and metadata capacity. The prediction mode can be encoded according to a mode table that relates mode to bits and by considering coding impact. Start and stop codes can be used to signal the message, while various techniques of how to properly design the mode to bits tables are presented.04-02-2009
201002662173D CONTENTS DATA ENCODING/DECODING APPARATUS AND METHOD - A 3D contents data encoding method includes receiving a plurality of primitive data contained in 3D contents data, and encoding each of the received primitive data in accordance with a predetermined encoding order for the primitive data.10-21-2010
20080260268Liquid-Crystal-Driving Image Processing Circuit, Liquid-Crystal-Driving Image Processing Method, and Liquid Crystal Display Apparatus - In a liquid-crystal-driving image processing circuit that encodes and decodes image data to reduce the frame memory size, the present invention has the object of providing a liquid-crystal-driving image processing circuit capable of correcting image data accurately and applying appropriately corrected voltages to the liquid crystal without being affected by encoding or decoding errors, even when moving images are input.10-23-2008
20090087109REDUCED CODE TABLE SIZE IN JOINT AMPLITUDE AND POSITION CODING OF COEFFICIENTS FOR VIDEO COMPRESSION - A coding method, apparatus, and medium with software encoded thereon to implement a coding method. The coding method includes jointly encoding joint events that each are defined by a cluster of consecutive non-zero-valued coefficients, each joint event defined by three parameters: the number of zero-valued coefficients preceding the cluster, the number of non-zero-valued coefficients in the cluster, and an indication of which trailing coefficients up to a maximum number of M trailing coefficients have amplitude greater than 1, with the coding using a 3-dimensional joint VLC table. The method further includes encoding the amplitude of the non-zero-valued trailing coefficients that have amplitude greater than 1 encoding the amplitude of any remaining non-zero-valued coefficients in the clusters that have more than M non-zero-valued coefficients.04-02-2009
20090087111IMAGE ENCODING APPARATUS AND METHOD FOR THE SAME AND IMAGE DECODING APPARATUS AND METHOD FOR THE SAME - An image encoding apparatus includes a pixel bit depth increase converter to convert bit depth of each pixel of an input image to output a converted input image and output bit conversion information indicating the number of bits changed by conversion, an image encoder to encode the input converted input image to output encoded image information, and a multiplexer to multiplexes the bit conversion information and encoded image information.04-02-2009
20120294545PREDICTIVE CODING METHOD FOR CODING TEXTURE OF IMAGE - A predictive coding method for coding intra of frames is revealed. Firstly, an encoder divides an image frame into a plurality of macroblocks. Then the encoder sets predictive coding models corresponding to these macroblocks according to a ratio. The encoder performs predictive coding for coding each macroblock according to the corresponding predictive coding model so as to get and output a coded image. By the present invention, various predictive coding models are set and applied to code the different macroblocks so as to increase predictive coding efficiency. The intra prediction efficiency and image compression efficiency are improved simultaneously.11-22-2012
20100080480Lossless compression-encoding device - In a lossless compression-encoding device, a differential coding part calculates a prediction value of data to be compressed, and calculates a prediction error that is a difference between the prediction value and an actual value of the data to be compressed. A prediction error conversion part performs reversal of a sign bit of the prediction error output by the differential coding part in case that the reversal of the sign bit of the prediction error decreases an absolute value of the prediction error. A variable-length coding part performs variable-length coding on the prediction error that has been processed by the prediction error conversion part to generate a variable-length code representing the prediction error, and outputs the variable-length code as compressed data in such a manner that a code length of the compressed data decreases as the absolute value of the prediction error decreases.04-01-2010
20100098345ADAPTIVE FILTER REPRESENTATION - The present invention teaches a filter process used in intra or inter prediction of pixel blocks. A first, optionally interpolation, filter is applied in the first filter process to get filtered, optionally interpolated, pixel values. A differential filter and an adaptive gain are utilized in the second process for improving the prediction performance. The adaptivity of the gain can be made even on block basis, allowing a fine tuning of the pixel prediction and/or a fine tuning of pixel rotation and zooming. Alternatively, a combined one-step filter process using the interpolation filter, the differential filter and the adaptive gain is applied to the pixel values.04-22-2010
20090202164Method and apparatus for digital image coding - A method of coding a digital image includes subdividing the image into image blocks formed by a plurality of pixels, and processing each image block of the image, by determining a skip-mode prediction block in respect of the current image block being processed, calculating a difference between the image block being processed and the skip-mode prediction block, and comparing the calculated difference to a predetermined threshold. The calculation of the difference between the current image block being processed and the skip-mode prediction block includes: calculating a plurality of pixel-by-pixel differences between a pixel of the current image block and a corresponding pixel of the skip-mode prediction image block; associating a respective quantized value with each pixel-by-pixel difference; and cumulating the quantized values.08-13-2009
20090279800IMAGE COMPRESSION APPARATUS, IMAGE EXPANSION APPARATUS, AND IMAGE PROCESSING APPARATUS - An input pixel valid-bit-number setting unit sets an input pixel valid-bit-number which is the number of gradations of input pixel data. A predictive pixel value generating unit refers to the higher-order bits of earlier already-input pixel data to generate a predictive pixel value for the higher-order bits of a new input pixel. A prediction error group detecting unit detects a prediction error group indicative of the magnitude range of a difference between the predictive pixel value and the value of the higher-order bits of the new input pixel. A prediction error encoding unit multiplexes variable-length encoded information indicative of the prediction error group, overhead bits indicative of a specific value within the prediction error group, and the lower-order bits of the input pixel appropriate for the input pixel valid-bit-number.11-12-2009
20090279801DECODING DEVICE, DECODING METHOD, DECODING PROGRAM, AND INTEGRATED CIRCUIT - A decoding device that improves the cache hit rate in the decoding process of compressed encoded image data. The decoding device, before the decoding process, generates a sort table for each reference picture for a plurality of MPEG data streams included in a GOP and having a frame type of P- or B-picture. The decoding device, by using the generated sort table, selects a group of pictures composed of a plurality of decoding target macro blocks that refer to the same reference macro block. The decoding device obtains, from the reference picture, four macro blocks including the same reference macro block referred to by the selected picture group, and stores the four macro blocks into the cache memory. The decoding device sequentially decodes each decoding target macro block included in the selected picture group, by using the four macro blocks stored in the cache memory.11-12-2009
20120294544IMAGE COMPRESSION METHOD - An image compression method is provided. Residuals of a lot of pixel data are calculated. Respective compression costs of the residuals of the pixel data are estimated according to a lot of category residual relationships. The compression costs are compared and one of the category residual relationships is selected. The residuals of the pixel data are compressed according to the selected category residual relationship.11-22-2012
20090297053IMAGE ENCODING DEVICE AND IMAGE ENCODING METHOD - The invention aims at reducing the circuit size while maintaining the creation of a predictive image suitable for the intra prediction based on a pipeline processing. The encoding device operable to perform intra prediction in blocks of pixels resulting from division of a frame of a moving image has a pseudo-local-decode-image-creation module for simply encoding an original image, and an intra prediction module for using the created pseudo local decode image to select an intra prediction mode. In the intra prediction based on pipeline processing, the pipeline stage for selecting an intra prediction mode and the pipeline stage for creating predictive image data according to the selected intra prediction mode are separated.12-03-2009
20120294546STEREO IMAGE ENCODING APPARATUS, ITS METHOD, AND IMAGE PICKUP APPARATUS HAVING STEREO IMAGE ENCODING APPARATUS - When a plurality of image signals of an object picked up by a plurality of image pickup units are encoded on a predetermined pixel block basis by using an inter-prediction between images, difference information showing an offset between the images is generated from the plurality of image signals, and a search range which is set in order to detect a vector on the predetermined pixel block basis is adaptively set in accordance with the generated difference information.11-22-2012
20100061645SYSTEM AND METHOD FOR VIDEO ENCODING USING ADAPTIVE LOOP FILTER - Disclosed herein is a method for reducing blocking artifacts at the boundary between adjacent blocks reconstructed from a frame of compressed video information. The video information includes a prediction stage parameter with respect to at least one of the blocks. The method includes reconstructing the at least one block based on the prediction stage parameter, computing a residual error attribute from the reconstructed block, computing a filter strength value based on a baseline filter strength and at least one incremental value, wherein the incremental value is selected from a plurality of preset values based at least on one of the prediction stage parameter and residual error attribute associated with the at least one block and filtering the boundary adjacent to the at least one block using the selected filter strength value.03-11-2010
20090169122METHOD AND APPARATUS FOR FOCUSING ON OBJECTS AT DIFFERENT DISTANCES FOR ONE IMAGE07-02-2009
20090003718Inverse Tone Mapping for Bit-Depth Scalable Image Coding Adapted to Variable Block Sizes - A method performs inverse tone mapping of an image in a decoder. For each block of each color channel of the image a scaling factor is determined by adding a predicted scaling factor for the current block to a difference between the predicted scaling factor and the scaling factor of an adjacent block. An offset value for the current block is determined by adding a predicted offset for the current block to a difference between the predicted offset value and the offset value of the adjacent block. The scaling factor and the offset value are applied to pixel intensity values of the current block to produce a mapped block. The inverse tone mapping can also be applied to blocks of different sizes.01-01-2009
20090003717IMAGE ENCODING DEVICE, IMAGE DECODING DEVICE, IMAGE ENCODING METHOD AND IMAGE DECODING METHOD - An encoding device includes a color component separating unit for separating an input bit stream for the respective color components, a block dividing unit for dividing an input color component signal into blocks to generate a signal of an encoding unit area, a predicted image generating unit for generating a predicted image for the signal, a determining unit for determining a prediction mode used for encoding according to a prediction efficiency of the predicted image, a prediction error encoding unit for encoding a difference between the predicted image corresponding to the prediction mode determined by the determining unit and the input color component signal, and an encoding unit for variable length-coding the prediction mode, an output from the prediction error encoding unit, and a color component identification flag indicating the color component to which the input bit stream belongs as a result of the color component separation.01-01-2009
20090003716IMAGE ENCODING DEVICE, IMAGE DECODING DEVICE, IMAGE ENCODING METHOD AND IMAGE DECODING METHOD - An encoding device includes a color component separating unit for separating an input bit stream for the respective color components, a block dividing unit for dividing an input color component signal into blocks to generate a signal of an encoding unit area, a predicted image generating unit for generating a predicted image for the signal, a determining unit for determining a prediction mode used for encoding according to a prediction efficiency of the predicted image, a prediction error encoding unit for encoding a difference between the predicted image corresponding to the prediction mode determined by the determining unit and the input color component signal, and an encoding unit for variable length-coding the prediction mode, an output from the prediction error encoding unit, and a color component identification flag indicating the color component to which the input bit stream belongs as a result of the color component separation.01-01-2009
20080240593METHOD FOR ACCESSING IMAGE DATA AND METHOD FOR ACCESSING YUV420 IMAGE DATA - A method for accessing image data and a method for accessing YUV420 image data are disclosed. The method for accessing image data uses two different approaches to a buffer for accessing the JPEG image data, so that the method can achieve instant JPEG image data compression with only one buffer.10-02-2008
20090034856IMAGE ENCODING DEVICE, IMAGE DECODING DEVICE, IMAGE ENCODING METHOD, IMAGE DECODING METHOD, IMAGE ENCODING PROGRAM, IMAGE DECODING PROGRAM, COMPUTER READABLE RECORDING MEDIUM HAVING IMAGE ENCODING PROGRAM RECORDED THEREIN - An image encoder including: a predicted-image generating unit that generates a predicted image in accordance with a plurality of prediction modes indicating predicted-image generating methods; a prediction-mode judging unit that evaluates prediction efficiency of a predicted image outputted from the predicted-image generating unit to judge a predetermined prediction mode; and an encoding unit that subjects an output of the prediction-mode judging unit to variable-length encoding. The prediction-mode judging unit judges, on the basis of a predetermined control signal, which one of a common prediction mode and a separate prediction mode is used for respective color components forming the input image signal, and multiplexes information on the control signal on a bit stream, multiplexes, when the common prediction mode is used, common prediction mode information on the bit stream, and multiplexes, when the common prediction mode is not used, prediction mode information for each of the color components on the bit stream.02-05-2009
20080292197IMAGE ENCODING APPARATUS AND CONTROL METHOD THEREOF - According to this invention, encoded data are generated by sorting pixel data in a block according to different scan start positions and different scan routes upon generating encoded data for respective blocks, and encoded data with a smallest data amount of these encoded data is outputted. To this end, a block generation unit inputs blocks each defined by 8×8 pixels from image data to be encoded. Four encoding processing units respectively sort inputted 8×8 pixels according to the information stored in scan start position information storage units and scan route information storage units. The respective encoding processing units generate encoded data based on the sorted pixel data. A selector selects and outputs encoded data with a smallest data size from those generated by the encoding processing units.11-27-2008
20110206289Guaranteed-Rate Tiled Image Data Compression - A method of compressing digital image data is provided that includes, for each image data block in a plurality of image data blocks in the digital image data, transforming image data in the image data block to convert the image data to a low-frequency coefficient and a plurality of high-frequency coefficients, computing a predicted low-frequency coefficient for the image data block based on at least one neighboring image data block in the plurality of image data blocks, computing a residual low-frequency coefficient based on the predicted low-frequency coefficient and the low-frequency coefficient, quantizing the plurality of high-frequency coefficients, and entropy coding the residual low-frequency coefficient and the quantized high-frequency coefficients.08-25-2011
20080260270SPATIALLY ENHANCED TRANSFORM CODING - A system and method for improving prediction error coding performance of various video compression algorithms. Various embodiments combine the energy compaction features of transform coding with localization properties of spatial coding. In various embodiments, the effects of pixel “outliers” are removed from the transform and are coded separately as a spatially coded pixel prediction, thereby improving the coding gain of the transform.10-23-2008
20120195515IMAGE ENCODING DEVICE AND IMAGE DECODING DEVICE - Disclosed is an image encoding device that aims to increase encoding efficiency and to increase mode estimation accuracy using the characteristics of transformation coefficients. In response to an assessment value calculated on the basis of the characteristics of transformation coefficients, the range of estimated modes and selectable modes is limited, a mode that minimizes encoding cost is selected from among predetermined modes within the limited range of modes, when the number of the aforementioned limited modes is one, a flag for mode identification is not encoded, and when there are a plurality of modes, the aforementioned selected mode is encoded. As a result, the amount of encoding cost of the mode-identifying flag is decreased and encoding can be performed with a high encoding efficiency, mode estimation accuracy is increased, and furthermore, the amount of flag encoding is decreased and encoding efficiency is increased.08-02-2012
20080317367METHOD AND DEVICE FOR CONDENSED IMAGE RECORDING AND REPRODUCTION - According to an embodiment, the invention discusses techniques of encoding image data and decoding the encoded image data in an effective manner. As a result, recording and reproduction of data is optimized by compressing an image signal based on whether or not there exists a significant difference between two adjacent frames or units of image data.12-25-2008
20120063695METHODS FOR ENCODING A DIGITAL PICTURE, ENCODERS, AND COMPUTER PROGRAM PRODUCTS - In one embodiment, a method for encoding a digital picture of a sequence of digital pictures is provided, the digital picture comprising a plurality of pixels, wherein the plurality of pixels is associated at least partially with a first group of pixels and the plurality of pixels or a plurality of pixels of another digital picture is associated at least partially with at least one second group of pixels. The method comprises determining, for the second group of pixels, a second group of pixels coding mode, determining, for the first group of pixels, based on the second group of pixels coding mode, a first group of pixels coding mode, and encoding the digital picture using the first group of pixels coding mode for the first group of pixels.03-15-2012
20100002945IMAGE ENCODING APPARATUS, IMAGE DECODING APPARATUS, IMAGE ENCODING METHOD, IMAGE DECODING METHOD, IMAGE ENCODING PROGRAM, AND IMAGE DECODING PROGRAM - A variable-length encoder that feeds a Coded Block Pattern (CBP) as an input symbol to variable-length code output part. Coded symbol memory supplies CBPs in neighboring blocks as coding map table reference information to coding map table provider. Coding map table provider determines a coding map table used in coding of the CBP, based on these CBPs in the neighboring blocks, and provides a coding map table H01-07-2010
20090185751Image encoding apparatus and image decoding apparatus - An image encoding apparatus includes a converter 07-23-2009
20090052790IMAGE COMPRESSION DEVICE, COMPRESSING METHOD, STORAGE MEDIUM, IMAGE DECOMPRESSION DEVICE, DECOMPRESSING METHOD, AND STORAGE MEDIUM - An image compression device having a prediction unit for predicting a value of a compressing target pixel from peripheral values, and quantizing prediction error between a prediction value of the prediction unit and a value of an actual pixel in a predetermined quantizing step, comprising: a specific pixel level difference evaluation unit sequentially calculating the difference value between the level values as a sum of the prediction values corresponding to each of the compressed pixel immediately before the compressing target pixel and peripheral compressed pixels adjacent to the pixel and the quantization value of the prediction error, and evaluating the sameness of the difference value; and a quantization switching unit controlling the quantization in the quantizing step more precise than the quantizing step used when the difference value continuously indicates the same value as a result of the evaluation by the specific pixel level difference evaluation unit.02-26-2009
20090052789Image processing apparatus and method for processing interlaced video - The invention provides an image processing apparatus for processing an interlaced video which includes a judging module, a determining module and a processing module. The judging module is used for judging if a pixel in the kth frame among P frames of the interlaced video relates to a moving object. If the result judged by the determining module is YES, the determining module determines one between two pixels adjacent to the judged pixel in the frame as an edge pixel relative to an edge of the moving object. The first processing module is used for calculating a gray scale of the edge pixel determined by the determining module in an average way.02-26-2009
20130216150IMAGE PROCESSING DEVICE, IMAGE PROCESSING METHOD, AND PROGRAM - The present invention relates to an image processing device, an image processing method, and a program that can reduce usage of memory bandwidth when motion compensation operations with fractional precision are performed in inter predictions. A reference image read unit reads predetermined reference pixels from a reference image in an inter prediction so that the number of the predetermined reference pixels corresponding to an outer pixel in a predicted image in the inter prediction is smaller than the number of the predetermined reference pixels corresponding to an inner pixel in the predicted image. Using the read predetermined reference pixels, a 2-tap FIR filter, a 4-tap FIR filter, or a 6-tap FIR filter calculates a pixel having a fractional position in the reference image as a pixel in the predicted image. The present technique can be applied to encoding devices that perform compression encoding by H.264/AVC, for example.08-22-2013
20110142359METHOD FOR GENERATING THUMBNAIL IMAGE IN IMAGE FRAME OF THE H.264 STANDARD - The present invention relates to a method for generating a thumbnail image for a video image, and more particularly, to a method for generating a thumbnail image for a video image that includes directly computing a DC coefficient of a prediction block for the video block constituting a video image from a prediction reference pixel of the video block of a spatial domain, and computing a DC coefficient of the video block from the computed DC coefficient of the prediction block and from a DC coefficient of an residual block for the video block. The method for generating a thumbnail image according to the present invention directly computes a DC coefficient of the video block from the DC coefficient of the residual block for the video block and the DC coefficient of the prediction block for the video block, thus generating a thumbnail image for a video image of the H.264 standard without transforming the video block between the spatial domain and a transform domain constituting a video image, and quickly searching a specific video image through the thumbnail image in a multimedia terminal where a plurality of video images are stored.06-16-2011
20090097763Converting video and image signal bit depths - A technique includes converting a first value for a pixel that is associated with a lower bit depth into a second value for the pixel, which is associated with a higher bit depth based at least in part on a neighborhood of the pixel.04-16-2009
20090245667REDUCED CALCULATIONS IN DETERMINING INTRA-PREDICTION TYPE METHOD AND SYSTEM - The method, system, and apparatus of source statistics based intra prediction type is disclosed. In one embodiment, a method includes classifying a four-pixel square block in ad edge class (e.g., may include a DC edge class, a vertical edge class, a horizontal edge class, a diagonal edge class, and/or a planar edge class) based on an edge classifier, classifying an eight-pixel square block having the four-pixel square block and other four-pixel square blocks as a homogenous class if the four-pixel square block and the other four-pixel square blocks of the eight-pixel square block belong to the edge class, assigning a direction to the edge class of the eight-pixel square block, and determining an optimal intra-prediction type through the classification such that empirical testing of all possible ones of the edge class and the direction is avoided when the homogenous class is identified.10-01-2009
20110142358IMAGE ENCODING DEVICE - The image encoding device includes: signal-to-signal predicting means 06-16-2011
20090245668PICTURE ENCODING APPARATUS AND METHOD, PROGRAM AND RECORDING MEDIUM - An apparatus and a method for compressing a picture by wavelet transform and entropy coding, in which the processing load of arithmetic coding may be relieved and rate control may be carried out effectively, while still maintaining the picture quality. An encoding object prediction unit predicts bitplanes to be encoded and extracts only those bitplanes which are to be encoded. An EBCOT unit generates an encoding pass from one bitplane to be encoded to another to execute arithmetic coding. In controlling the code volume to a target code volume, a rate controller sums the arithmetic codes in a sequence from the arithmetic code with the highest bit position in the totality of the code blocks of an input picture to the arithmetic code of the lowermost bit, from one bitplane to another or from one encoding pass to another, and halts the summation when the predetermined target code volume is exceeded.10-01-2009
20090317008METHOD AND APPARATUS FOR ENCODING/DECODING IMAGE USING ADAPTIVE DISTRIBUTION ADJUSTMENT OF DIFFERENTIAL VALUES - Provided are an image encoding method and apparatus, in which a distribution of difference values included in an image unit is adjusted using a predetermined offset, an image unit including the adjusted distribution of the difference values is divided into an image plane corresponding to upper bits and an image plane for lower bits, and then the image planes are entropy-encoded.12-24-2009
20090252426LINEAR TEMPORAL REFERENCE SCHEME HAVING NON-REFERENCE PREDICTIVE FRAMES - The method, system, and apparatus of linear temporal reference scheme having non-reference predictive frames is disclosed. In one embodiment, a method of a temporal reference scheme includes creating a non-reference predictive frame and a reference predictive frame from a reference frame, increasing a quantization factor of the non- and reference predictive frame by a threshold value, and decreasing the quantization factor of the reference predictive frame by the threshold value. The method may include toggling between the temporal reference scheme and another temporal reference scheme in which there may be no non-reference predictive frames and only reference predictive frames based on a scenario. The method may also include calculating a target bit rate across a communication channel through a bit rate calculation algorithm that considers a bandwidth capacity across the communication channel.10-08-2009
20090257669LOCAL ILLUMINATION AND COLOR COMPENSATION WITHOUT EXPLICIT SIGNALING - There are provided method and apparatus for local illumination and color compensation without explicit signaling. An apparatus includes an encoder for encoding a picture by enabling at least one of color compensation and illumination compensation of at least one color component of a prediction for an image block of the picture without using explicit signaling. The method comprises at least the step of enabling the encoding of a picture described above in the apparatus, again without use of explicit signaling. In the description of an specific embodiment, this enabling of the color compensation and the illumination compensation is based on at least one of a group of pixels and a local signal block corresponding to the picture. Similar descriptions are provided for a method and apparatus for decoding the signal the encoded signal. There are provided method and apparatus for local illumination and color compensation without explicit signaling. An apparatus includes an encoder for encoding a picture by enabling at least one of color compensation and illumination compensation of at least one color component of a prediction for an image block of the picture without using explicit signaling. The method comprises at least the step of enabling the encoding of a picture described above in the apparatus, again without use of explicit signaling. In the description of an specific embodiment, this enabling of the color compensation and the illumination compensation is based on at least one of a group of pixels and a local signal block corresponding to the picture. Similar descriptions are provided for a method and apparatus for decoding the signal the encoded signal.10-15-2009
20080232705METHOD AND APPARATUS FOR IMAGE ENCODING AND IMAGE DECODING - Provided are a method and apparatus for image encoding which improves encoding efficiency in accordance with image characteristics by performing prediction in lines and performing a one-dimensional transformation in lines on an input image, and a method and apparatus for image decoding. Encoding efficiency of an image may be improved by generating a prediction sub residual block using neighboring residues and performing a one-dimensional discrete cosine transformation (DCT) on a difference residual block which is a difference between an original sub residual block and the prediction sub residual block.09-25-2008
20120195514MOVING PICTURE CODING METHOD AND MOVING PICTURE DECODING METHOD - According to a picture coding method, a coded picture is stored, as a reference picture, into a storage unit; commands indicating correspondence between reference pictures and reference indices for designating reference pictures and coefficients used for generation of predictive images are generated; a reference picture being used when motion compensation is performed on a current block in a current picture to be coded is designated by a reference index; a predictive image is generated by performing linear prediction on a block being obtained by motion estimation within the designated reference picture, by use of a coefficient corresponding to the reference index; a coded image signal including a coded signal obtained by coding a prediction error being a difference between the current block in the current picture to be coded and the predictive image, the commands, the reference index and the coefficient is outputted.08-02-2012
20120141042IMAGE PROCESSING SYSTEM, IMAGE PROCESSING METHOD AND PROGRAM FOR IMAGE PROCESSING - A geometric transformation parameter computing unit computes a geometric transformation parameter which represents the geometric transformation of an image from the previous frame to the current frame, and calculates the level of reliability in that geometric transformation parameter. A super-resolution image prediction unit generates a prediction of a super-resolution image in the current frame by transforming a super-resolution image in the previous frame on the basis of the geometric transformation parameter. A super-resolution image generation unit calculates a low-resolution image in the current frame from the prediction result of the super-resolution image in the current frame by a simulation, calculates a difference between a low-resolution image, which is an input image for the current frame, and the simulation result, and calculates a weighted mean between a result of upsampling the difference and the prediction result of the super-resolution image in the current frame. Herein, the weighted mean is calculated on the basis of the level of reliability in the geometric transformation parameter.06-07-2012
20120141041IMAGE FILTERING METHOD USING PSEUDO-RANDOM NUMBER FILTER AND APPARATUS THEREOF - An image filtering method and apparatus that filter a block of a plane area by using a pseudo-random filter are provided, whereby artifacts generated in image encoding and decoding procedures are removed, the method including: determining a similarity between pixel values of a the first block; and generating a second block by selectively applying a pseudo-random filter on the first block according to a result of based on the determining the determined similarity.06-07-2012
20090116760IMAGE PREDICTIVE CODING DEVICE, IMAGE PREDICTIVE CODING METHOD, IMAGE PREDICTIVE CODING PROGRAM, IMAGE PREDICTIVE DECODING DEVICE, IMAGE PREDICTIVE DECODING METHOD AND IMAGE PREDICTIVE DECODING PROGRAM - A block divider divides an input image into a plurality of regions. A prediction signal generator generates a prediction signal for the pixel signal contained in an object region, which is the object of processing, among the plurality of regions, and generates a prediction signal by using a texture synthesis method for forming a texture signal for the object region. A subtracter determines a residual signal between the pixel signal of the object region and the prediction signal, and a transformer and quantizer encode the residual signal to generate a compressed signal.05-07-2009
20090116759VIDEO ENCODING DEVICE, VIDEO ENCODING METHOD, VIDEO ENCODING PROGRAM, VIDEO DECODING DEVICE, VIDEO DECODING METHOD, AND VIDEO DECODING PROGRAM - A video encoding device including a region division section for dividing a frame image constituting video data into a plurality of regions as encoding target regions, an encoding section for encoding an image of each region, an inverse transformation section and an addition section for generating reproduced image of the encoded image, a storage section for storing reproduced images, a prediction generation section for searching a region which is highly correlated to a reproduced image of a template region, which is adjacent to the region of the encoding target image in a predetermined positional relationship and is a part of the reproduced image, from the reproduced image, and determining a prediction signal based on the searched region and the above-mentioned positional relationship, and a subtraction section for generating a difference signal between the prediction signal and the encoding target image as a signal for encoding.05-07-2009
20100226588IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD AND COMPUTER-READABLE MEDIUM - An image processing apparatus includes a binarization unit, a determination unit and a pixel value calculating unit. The binarization unit binarizes image data. The determination unit determines as to whether or not each pixel of the image data binarized by the binarization unit forms a peripheral portion of a pixel block. The pixel value calculating unit calculates a corrected pixel value of the pixel block based on (i) pixel values of pixels which are determined by the determination unit not to form the peripheral portion of the pixel block and (ii) pixel values of pixels forming the pixel block.09-09-2010
20090238481METHOD AND APPARATUS FOR GENERATING CODED BLOCK PATTERN FOR HIGHPASS COEFFICIENTS - A method and an apparatus for generating a coded block pattern for highpass coefficients are provided. The method includes receiving a quantized highpass coefficient (HP), wherein the HP includes a macroblock data; dividing the macroblock into a plurality of blocks; performing lapped transform (LT) operations of two stages on the said block data, concurrently calculating a plurality of coded block patterns of the blocks corresponding to all possible HP prediction directions; performing a calculation to obtain selection information of the HP prediction directions according to lowpass coefficients (LPs) generated through LT operations of the two stages; selecting a corresponding coded block pattern among the said coded block patterns according to the above-mentioned selection information of the HP prediction directions and outputting the selected coded block pattern.09-24-2009
20080310744METHOD AND APPARATUS FOR INTRAPREDICTION ENCODING/DECODING USING IMAGE INPAINTING - A method and apparatus for intraprediction encoding/decoding is provided. The method includes performing image inpainting based on pixels included in a previously encoded region of a current picture among pixels that are adjacent to a boundary between a current block and the previously encoded region of the current picture in order to predict the current block, and performing prediction encoding on the current block using the prediction result. Thus, a new intraprediction mode in which the current block can be accurately predicted can be provided.12-18-2008
20090110312Method of image compression with intelligent prediction mechanism - A method of compressing an image by referring to the correlation of previous line information results in high image quality. A register is used to save the previous line information and the derived predictive method for compressing future line of pixels. Another register is used to save the complexity of the previous line for more accurately calculating the bit rate distribution of each segment for compressing future line.04-30-2009
20130136375IMAGE CODING METHOD, IMAGE DECODING METHOD, IMAGE CODING APPARATUS, IMAGE DECODING APPARATUS, AND IMAGE CODING AND DECODING APPARATUS - An image coding method includes coding first binary data indicating a first intra prediction mode and second binary data indicating a second intra prediction mode, wherein in the coding, a first context adaptive portion which is part of the first binary data and a second context adaptive portion which is part of the second binary data are coded by context adaptive binary arithmetic coding, a first bypass portion which is different part of the first binary data and a second bypass portion which is different part of the second binary data are coded by bypass coding, and coded data is generated which includes the first context adaptive portion, the second context adaptive portion, the first bypass portion, and the second bypass portion, the first bypass portion and the second bypass portion being included subsequent to the first context adaptive portion and the second context adaptive portion.05-30-2013
20100310184DUAL PREDICTION VIDEO ENCODING AND DECODING METHOD AND DEVICE - A method and apparatus for second order prediction are provided. In the decoding method, the reconstruction of decoded picture comprises second order prediction and compensation and second prediction storage. The second order prediction and compensation comprises first prediction and compensation and second prediction and compensation, input of which includes reconstructed first order residue and second order residue. The encoding method comprises second order prediction and second prediction storage. Second order prediction consists of first prediction and second prediction, input of which includes reconstructed first order residue and second order residue, and it will generate bit-stream accordingly. This invention will eliminate redundancy using second order prediction encoding and decoding method, so that coding efficiency will be improved.12-09-2010
20110170793IMAGE PROCESSING APPARATUS AND METHOD - The present invention relates to an image processing apparatus and method with which in an intra template matching system, it is possible to improve an encoding efficiency in a case where a change in luminance exists with respect to an identical texture in a screen.07-14-2011
20090067734Methods and apparatuses for encoding and decoding an image - A method as well as a system, a device, an encoding apparatus, a decoding apparatus, a module and a computer software product for image processing is disclosed. The image comprises a pixel matrix, in which the pixels comprise a first number of bits. The pixel matrix is divided to two or more blocks of pixels. The pixels are processed on a block-by-block basis to form encoded pixel values including a certain second number of bits. Bit strings are formed on the basis of the encoded pixels. When decoding the image the bit strings are examined to find out the encoding method used in encoding the pixel, and decoding is performed on a block-by-block basis to retrieve pixel values of the image.03-12-2009
20110019930IMAGE ENCODING DEVICE AND IMAGE ENCODING METHOD - An image encoding device includes: a first encoding unit for calculating a generated code amount by encoding image data for each GOP (Group of Picture); a code amount control unit for setting quantization information for realizing a target generated code amount based on the generated code amount; a quantization information distinguishing unit for calculating a DCT (Discrete Cosine Transform) coefficient, and distinguishing quantization information that minimizes the summation for each picture of remainders when performing division of the DCT coefficient, as quantization information used for performing the last encoding; a picture-type setting unit for setting a picture type to the image data for each GOP, and when this set picture type differs from the picture type of the distinguished quantization information, matching the picture types by controlling the settings of the subsequent picture types; and a second encoding unit for encoding the image data based on the set picture type.01-27-2011
20110026845PREDICTION OF IMAGES BY PRIOR DETERMINATION OF A FAMILY OF REFERENCE PIXELS, CODING AND DECODING USING SUCH A PREDICTION - A method is provided for predicting partitions of at least one group of pixels in an image to be coded, with respect to a group of reference pixels. Accordingly, the group of reference pixels is obtained by calculating a function characteristic of a predetermined mode of prediction, the reference pixels of the group obtained being variable from one partition to another.02-03-2011
20110033127Prediction-Based Image Processing - A pixel block (02-10-2011
20110033125Image processing apparatus and method for image processing - While a natural image having a resolution of 600 dpi is enlarged at a predetermined magnification ratio and is printed at a resolution of 1200 dpi, if the magnification ratio is equal to or more than two, the natural image is enlarged by using a nearest neighbor method. If the magnification ratio is less than two, a reduction image is generated by reducing an enlargement image obtained by enlarging an object image based on a magnification ratio to 1/2, and the reduction image is enlarged to twice the size by using the nearest neighbor method. The natural image obtained by enlarging in this manner is compressed and encoded by using prediction encoding and run-length encoding with which a run-length value having a prediction error of 0 is calculated.02-10-2011
20110019929IMAGE ENCODING DEVICE AND IMAGE ENCODING METHOD - An image encoding device includes: a first encoding unit for encoding image data using a fixed-quantizing parameter to calculate a generated code amount; a second encoding unit for encoding the image data using multiple different quantizing parameters for each of the quantizing parameters as the image data of an intra picture to calculate a generated code amount; a code amount control unit for determining a quantizing parameter by predicting a quantizing parameter for realizing a target generated code amount, and a generated code amount when employing this quantizing parameter based on the generated code amount calculated at the first encoding unit, and correcting this predicted generated code amount according to the generated code amount calculated at the second encoding unit so as to realize the target generated code amount; and a third encoding unit for encoding the image data using the quantizing parameter determined at the code amount control unit.01-27-2011
20110044550INTER-VIEW STRIP MODES WITH DEPTH - Various implementations are described. Several implementations relate to one or more encoding modes that use depth information to determine a corresponding reference block. According to a general aspect, a portion of a first-view image from a first view in a multiple-view system is encoded. The portion is all or part of the first-view image. It is determined that a portion of a second-view image from a second view in the multiple-view system corresponds to the portion of the first-view image. The determination is based on a second-view depth value providing depth information for the portion of the second-view image. The portion of the second-view image is encoded using information from the encoding of the portion of the first-view image.02-24-2011
20110129162APPARATUS AND METHOD FOR LOSSLESS/NEAR-LOSSLESS IMAGE COMPRESSION - Provided is a lossless/near-lossless image compression apparatus and method. The lossless/near-lossless image compression method may include calculating a predicted value by predicting a pixel of a current location based on adjacent pixels, calculating an error that is a difference between the predicted value and a pixel value, and modulating the error to output the modulated error, encoding the modulated error, and controlling a tolerance based on a slice unit to enable a number of encoded bits to be the same as a target number of encoded bits. The tolerance may be set to be gradually increased or to be decreased to prevent a rapid change in the tolerance.06-02-2011
20100054616METHODS AND APPARATUSES FOR ENCODING AND DECODING IMAGE BY USING IMPROVED COMPRESSION RATIO OF ENCODING INFORMATION - Provided are methods and apparatuses for encoding and decoding an image. The method of encoding the image includes calculating the number of times that encoding information of each of a plurality of sub-blocks included in a current block is exactly predicted, determining whether or not to predictably encode the encoding information of each sub-block, based on the calculated number of times, and predictably encoding the encoding information of each sub-block according to the determination. Using the method can prevent the case in which many bits are required to encode the encoding information due to inexact prediction about the encoding information, thereby decreasing the compression ratio of the image encoding process, and can compress the image with a higher efficiency.03-04-2010
20090245669IMAGE PROCESSOR - An image processor includes an encoding unit encoding inputted data. The encoding unit includes a first processing unit splitting the data into a first partial data in a first digit range on an upper side and a second partial data in a second digit range on a lower side, a second processing unit encoding only the first partial data between the first partial data and the second partial data, and a third processing unit performing correction to set a value of the first partial data at “0”.10-01-2009
20100054617CODING AND DECODING DEVICE, CODING AND DECODING METHOD AND PROGRAM - A coding device is comprised of an initial resolution coding unit for coding an initial resolution image sub-sampled from an image at every interval of predetermined pixels, and a high resolution coding unit for coding images at sub-sampling intervals sequentially halved, wherein said high resolution coding unit comprises a pixel value predicting means for, out of the pixels that should be coded in present resolution, predicting a value of a pixel being positioned at a center of its adjacent four pixels already coded in previous resolution from said adjacent four pixels with a linear interpolation, and predicting a value of a remaining pixel from its adjacent four pixels having the above pixel at a center thereof with the linear interpolation, said adjacent four pixels being positioned in an upper, lower, left and right sides of the above pixel, a prediction error calculating means for obtaining a residual between the pixel value of the to-be-coded pixel and the predicted value, and a variable length coding means for coding the residual.03-04-2010
20090028452IMAGE DECODING METHOD, IMAGE DECODING DEVICE, AND PROGRAM - A lower hierarchical decoder (01-29-2009
20100128995IMAGE CODING METHOD AND IMAGE DECODING METHOD - Provided is an image coding method for performing intra prediction achieving higher coding efficiency. The method for coding image data on a block-by-block basis includes: generating a predicted block by predicting a current block; computing a difference between the current block and the predicted block; coding the difference computed in the computing; decoding the difference coded in the coding; and adding the difference decoded in the decoding to the predicted block to generate a decoded block, wherein the generating includes: detecting an edge in a previously decoded block corresponding to a block adjacent to the current block; and extrapolating or interpolating previously decoded image data corresponding to a pixel included in the block adjacent to the current block, along a direction of the edge detected in the detecting to generate the predicted block.05-27-2010
20110069900Random access image encoding system and method - An image encoding system and method for performing random access may be provided. The image encoding system may perform intra prediction based on a processing unit, and code a pixel using a result of the intra prediction. Also, the image encoding system may generate a bitstream with respect to an input image using a Fixed Length Code (FLC). Coding may be performed based on the processing unit, and thus random access may be performed based on the processing unit.03-24-2011
20120201475METHOD AND SYSTEM FOR PROCESSING AN IMAGE - There is provided according to an aspect the present invention a method and a system for processing a discrete input image to a reduced-size discrete output image. According to some embodiments, the system may include an interface, a quality parameter controller and an intra-prediction encoder. The quality controller is adapted to provide an encoding-quality parameter enabling a substantial size reduction of the discrete output image, wherein the parameter is related to a target quantitative-similarity measure between the output image and the input image. The intra-prediction encoder is adapted to re-encode the input image, wherein re-encoding includes intra-image prediction, and wherein the encoder is configured in accordance with the encoding-quality parameter.08-09-2012
20110033126METHOD FOR IMPROVING THE PERFORMANCE OF EMBEDDED GRAPHICS CODING - Embedded Graphics Coding (EGC) is used to encode images with sparse histograms. In EGC, an image is divided into blocks of pixels. For each block, the pixels are converted into binary representations. For each block, the pixels are scanned and encoded bit-plane by bit-plane from the most significant bit-plane (MSB) to the least significant bit-plane (LSB). The pixels in the block are partitioned into groups. Each group contains pixels with the same value. From the MSB to the LSB, the groups in the current bit plane are processed. During the processing, a group is split into two, if pixels in the group have different bit values in the bit-plane being encoded. Then, the encoder sends the refinement bit for each pixel in the group and the encoder splits the original group into two. A method is described herein to compress the refinement bits which employs context-adaptive prediction and binary run-length coding.02-10-2011
20080253670Image Signal Re-Encoding Apparatus And Image Signal Re-Encoding Method - The present invention provides an image signal re-encoding apparatus and image signal re-encoding method, which reduce the amount of processing when re-encoding an image signal, and shorten the processing time required for re-encoding. An image signal re-encoding apparatus, which decodes an input image signal subjected to an encoding, and generates an output image signal by subjecting the decoded image signal to an encoding process of a system different from said encoding, the image signal re-encoding apparatus further comprising; extraction means for extracting orthogonal conversion coefficient information related to the input image signal; determination means for determining the pixel tendency of a pixel block included in the input image signal using the extracted orthogonal conversion coefficient information; prediction mode decision means for deciding an intra-frame prediction mode to be used in said encoding process in accordance with a determination result of said pixel tendency; and re-encoding means for implementing said encoding process for the decoded image signal using said intra-frame prediction mode.10-16-2008
20090022410METHOD AND APPARATUS FOR CODED APERTURE IMAGING - Methods for coded aperture imaging, and processing the data from coded aperture imaging are taught. Several snapshots of an image are acquired, each using a different coded aperture array. The several snapshots are combined together with appropriate weightings to form a single equivalent frame as are the aperture functions for the coded aperture arrays used. Combining several frames of data can improve the signal to noise ratio of the decode image and increase the resolution of the image. Preferably a balanced weighting system is used and image reconstruction is performed by inverting the covariance matrix formed by the covariance of the signals from a number of estimated trial points. Using a balanced weighting system reduces the covariance matrix to a diagonal or near diagonal matrix with a corresponding reduction in computational load. The techniques also reduces additive noise. Various technique for compensating for camera motion and identifying motion in the scene are also taught along with suitable apparatus for performing the invention.01-22-2009
20100128996METHOD AND APPARATUS FOR ENCODING AND DECODING IMAGE ADAPTIVE TO BUFFER STATUS - A method of encoding an image includes checking a storage status of a buffer storing encoded data, at every data unit equal to or less than at least one macroblock; rearranging information about a macroblock so that encoded data of the macroblock is reduced, based on the storage status of the buffer; and storing data encoded by using data of the image and the information about the macroblock, which is rearranged based on the storage status of the buffer, in the buffer.05-27-2010
20080267517IMAGE PROCESSING APPARATUS AND CONTROL METHOD THEREOF - An image processing apparatus is provided which can restore original data by combining divided data without requiring information about the number of divisions and about succeeding data. To achieve this, the image processing apparatus includes a dividing section for successively dividing the original data at a data size predetermined with respect to a prescribed two-dimensional code image; and a section for assigning a final flag indicating that the data is final data to the data divided lastly from the original data, and for assigning to the other data an ordinary flag indicating that the other data is not the final data.10-30-2008
20080253671METHOD AND APPARATUS FOR ENCODING AND DECODING MULTI-VIEW IMAGE - A Method and apparatus for encoding and decoding a multi-view image are provided. The method of encoding a multi-view image includes determining whether each of pictures included in multi-view image sequences is a reference picture referred to by other pictures included in the multi-view image sequences for inter-view prediction, and encoding the pictures using at least one of inter-view prediction and temporal prediction based on the determination result, thereby efficiently encoding and decoding the multi-view image at high speed.10-16-2008
20080253672Methods and Systems for Inter-Layer Image Parameter Prediction - Aspects of embodiments of the present invention comprise systems and methods for determining prediction parameters for a multi-layer image.10-16-2008
20080205779SELECTIVE PREDICTOR AND SELECTIVE PREDICTIVE ENCODING FOR TWO-DIMENSIONAL GEOMETRY COMPRESSION - A selective predictor utilizes a selective prediction method for coordinate data encoding. The selective predictor may calculate multiple prediction vectors for each vertex in the shape traversal order. Then, the selective predictor selects the vector that is closest to the vertex to be estimated. In determining the multiple prediction vectors, the selective predictor considers the position of several previous vertices in the traversal order. The selective predictor outputs a correction vector for the selected prediction vector and identification information indicting the selected prediction vector.08-28-2008
20110262050Two-Layer Prediction Method for Multiple Predictor-Set Intra Coding - An apparatus comprising a processor configured to receive a current block of an image, determine an optimal prediction mode of a plurality of prediction modes for the current block, wherein the optimal prediction mode corresponds to either a standard predictor set or a non-standard predictor set, predict a predicted predictor set based on a first known predictor set and a second known predictor set, clear a first flag if the predicted predictor set matches the optimal predictor set; and set the first flag if the predicted predictor set does not match the optimal predictor set.10-27-2011
20120148170METHOD AND APPARATUS FOR ENCODING AND DECODING AND MULTI-VIEW IMAGE - A Method and apparatus for encoding and decoding a multi-view image are provided. The method of encoding a multi-view image includes determining whether each of pictures included in multi-view image sequences is a reference picture referred to by other pictures included in the multi-view image sequences for inter-view prediction, and encoding the pictures using at least one of inter-view prediction and temporal prediction based on the determination result, thereby efficiently encoding and decoding the multi-view image at high speed.06-14-2012
20100183232IMAGE PROCESSOR, IMAGE PROCESSING METHOD AND PROGRAM - An image processor performing super-resolution of converting an input image with first resolution to an output image with second resolution higher than the first resolution on consecutive input images includes a prediction unit predicting the output image with the second resolution of a current frame using the input image of the current frame and the output image obtained by the super-resolution on an input image of a previous frame; a generation unit generating a reduced image with the first resolution composed of pixels at different phases of the prediction image using a prediction image obtained by the prediction of the prediction unit; a difference calculation unit calculating a difference between the input image of the current frame and the reduced image; and an addition unit adding the difference up-sampled to the second resolution to the prediction image, thus generating the output image with the second resolution of the current frame.07-22-2010
20080304759METHOD AND APPARATUS FOR ENCODING AND DECODING IMAGE BY USING INTER COLOR COMPENSATION - Provided are an image encoding method and apparatus and an image decoding method and apparatus that are capable of canceling a correlation remaining in a residual image by predicting the residual image by using residual pixel values of restored neighboring pixels of a current block and then encoding only the difference between the residual image and a predicted image of the residual image, where the residual image is obtained using an inter color compensation algorithm that predicts one of a plurality of color component images constituting an image by using one of the remnants of the color component images.12-11-2008
20100158400Accelerated Screen Codec - An accelerated screen codec technique is described that provides a general screen compression framework, which, in one embodiment, is Graphics Processor Unit (GPU) friendly. In one embodiment, in order to compress screen data, blocks in a compound screen image containing both images and text are segmented into text blocks and pictorial blocks using a simple gradient-based procedure. The text and pictorial blocks are then compressed respectively via different compression techniques. Additionally, a GPU acceleration architecture of one embodiment of the accelerated screen codec technique provides a screen codec that maximally exploits a GPU's high parallelism and reduces the download bandwidth from GPU to Computer Processing Unit (CPU).06-24-2010
20110188768IMAGE ENCODING METHOD AND DEVICE IMPLEMENTING AN IMPROVED PREDICTION, CORRESPONDING DECODING METHOD AND DEVICE, SIGNAL AND COMPUTER PROGRAMS - Techniques are provided for encoding and decoding image data. The techniques implement a prediction of data of a current block based on at least one already encoded block or reference block, wherein said prediction step takes into account a set of encoded blocks adjacent to said current block and including blocks that have not yet been considered according to said writing path order. Encoding includes the steps of: generating a dependence tree associating a current block with at least one reference block from which the predicted block associated with the current block has been predetermined; and inserting information representative of said dependence tree into said set of data associated with each block.08-04-2011
20120308151IMAGE CODING APPARATUS - An image coding apparatus calculates the activity of each macroblock. All the macroblocks of block lines are set as intra-candidate macroblocks (intra-candidate MBs) which are candidates for intra coding. Every other macroblock is set as an intra-candidate MB in block lines. One of the intra-candidate MBs in each block line, which has the minimum activity, is determined as an intra macroblock of a frame. The macroblock determined as the intra MB is changed from the intra-candidate MB to an intra-forbidden macroblock. After changing the setting of the intra-candidate MBs, intra macroblocks are determined for a frame inputted subsequent to the frame.12-06-2012
20120308150Predictive-Transform Source Coding With Subbands - A method, system, and apparatus are directed towards computing minimum mean squared error (MMSE) predictive-transform (PT) source coding integrated with subband compression to further improve the performance of low bit rate MMSE PT source coders. A desirable byproduct of the advanced scheme is that the incorporation of joint optimum prediction and transformation from subband to subband is ideally suited to its integration with JPEG2000 to yield even higher compression levels while producing an outstanding objective as well as subjective visual performance12-06-2012
20110116723Index-Based Pixel Block Processing - A pixel block (05-19-2011
20110135211METHOD FOR MODIFYING A REFERENCE BLOCK OF A REFERENCE IMAGE, METHOD FOR ENCODING OR DECODING A BLOCK OF AN IMAGE BY HELP OF A REFERENCE BLOCK AND DEVICE THEREFORE AND STORAGE MEDIUM OR SIGNAL CARRYING A BLOCK ENCODED BY HELP OF A MODIFIED REFERENCE BLOCK - The invention is related to a method for modifying a reference block of a reference image. That is, the method comprises transforming the reference block into a first set of coefficients, modifying the first set of coefficients by help of one or more weights and inverse transforming the modified first set of coefficients wherein said weights are determined by help of one or more further pixels of the current image and by help of one or more further reference pixels of the reference image. Using further pixels of the current image as well as further reference pixels of the reference image allows spectral weights to be determined such that they reflect fading effects. Especially, if a reference frame consists of two cross-faded frames of which one shall be predicted by help of said reference frame, then, spectral domain weighting allows for separating the relevant of the two frames.06-09-2011
20110305402IMAGE PROCESSOR - The image processor 12-15-2011
20110305401INTRA-PREDICTION MODE OPTIMIZATION METHODS AND IMAGE COMPRESSION METHODS AND DEVICES USING THE SAME - An intra-prediction mode optimization method and image compression method/device are disclosed. To properly determine an intra-prediction mode for a target block of an image, a control block is selected from reference blocks of the target block, and an intra-prediction mode adopted in the control block is regarded as a control mode. Assuming that the target block is encoded according to the control mode as well, the prediction efficiency of the target and control blocks is assessed. When the intra-prediction efficiency, under the control mode, of the target block is better than that of the control block, the control mode is determined to be the infra-prediction mode of the target block and an intra-prediction pattern of the target block can be obtained. Otherwise, another one of the reference blocks is selected to be the control block and the control mode is refreshed, to repeat the intra-prediction efficiency assessment.12-15-2011
20110317932IMAGE COMPRESSION METHOD WITH VARIABLE QUANTIZATION PARAMETERS AND VARIABLE CODING PARAMETERS - An image compression method is used for processing a plurality of pixels of an image. The image compression method includes the steps of receiving N pixels; analyzing the N pixels and generating a content type corresponding to the N pixels; obtaining a quantization parameter and a coding parameter corresponding to the N pixels according to the content type and a currently available buffer space value; obtaining N quantized differences corresponding to the N pixels through a prediction and quantization way according to values of the N pixels and the quantization parameter; and encoding the N quantized differences according to the N quantized differences and the coding parameter.12-29-2011
20120045141IMAGE ENCODING APPARATUS AND DECODING APPARATUS - A picture encoding apparatus divides an input picture into a plurality of regions and produces quantized transform coefficients of one of the regions. A zero/non-zero coefficient information encoding unit included in the picture encoding apparatus encodes information representing the respective quantized transform coefficients of the one region as either a zero coefficient or a non-zero coefficient. A non-zero coefficient encoding unit included in the picture encoding apparatus encodes non-zero quantized transform coefficient included among the quantized transform coefficients of the one region. The non-zero coefficient encoding unit is configured to select, from a probability model composed of a plurality of estimated probabilities, an estimated probability used to encode an absolute value of a next non-zero quantized transform coefficient of the one region. The estimated probability is selected from the probability model based on a quantity of already encoded non-zero quantized transform coefficients of the one region.02-23-2012
20110044551METHOD AND APPARATUS FOR ENCODING AND DECODING IMAGE USING FLEXIBLE ORTHOGONAL TRANSFORM - A method and apparatus for encoding an image by freely combining a plurality of prediction schemes and a plurality of orthogonal transform schemes based on grouping and matching of the plurality of prediction schemes and the plurality of orthogonal transform schemes is provided.02-24-2011
20120014614IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - An image processing apparatus includes a quantizer configured to quantize orthogonal transform coefficients of the difference in block units between a coding target picture and a prediction image, a predictor configured to conduct parallax prediction utilizing correlations between the coding target picture and a picture whose view differs from the coding target picture, and a quantization controller configured to determine a protected area that protects image quality from the parallax prediction results, and reduce the quantization step size of the quantizer for quantization of the protected area.01-19-2012
20120301041CODING DEVICE, CODING METHOD, AND PROGRAM - A rate control unit adjusts a target code amount that is a target of a code amount when a coding object image is coded based on a state of a capturing unit at the time of capturing the coding object image that is an object of coding, and an orthogonal transformation unit, a quantization unit, and a variable-length coding unit code the coding object image in accordance with the adjusted target code amount. The present technology, for example, can be applied to a coding device that codes each image obtained by capturing of the capturing unit.11-29-2012
20090274382ENTROPY DECODING CIRCUIT, ENTROPY DECODING METHOD, AND ENTROPY DECODING METHOD USING PIPELINE MANNER - An entropy decoding circuit, an entropy decoding method, and an entropy decoding method using a pipeline manner are provided. The entropy decoding circuit includes a coefficient register unit, a first entropy decoder, a read/write control circuit, and a second entropy decoder. The first entropy decoder reads a first stream to be decoded to perform a first entropy decoding process thereupon and writes it to the coefficient register unit in an adaptive scan order through the read/write control circuit. The second entropy decoder reads a second stream to be decoded and performs a decoding process thereupon according to a normalization parameter and whether a normalized coefficient is zero or not. Meanwhile, the normalized coefficient in the coefficient register unit is read out in a fixed scan order through the read/write control circuit to complete the decoding process.11-05-2009
20120155782METHOD AND APPARATUS FOR ENCODING AND DECODING AND MULTI-VIEW IMAGE - A Method and apparatus for encoding and decoding a multi-view image are provided. The method of encoding a multi-view image includes determining whether each of pictures included in multi-view image sequences is a reference picture referred to by other pictures included in the multi-view image sequences for inter-view prediction, and encoding the pictures using at least one of inter-view prediction and temporal prediction based on the determination result, thereby efficiently encoding and decoding the multi-view image at high speed.06-21-2012
20120155781IMAGE ENCODING APPARATUS AND METHOD - A Joint Photographic Experts Group Extended Range (JPEG-XR) image encoding apparatus and method changes a quantized value or a coefficient prediction method for each block, thereby dramatically improving processing speed of the apparatus.06-21-2012
20120106863IMAGE PROCESSING METHOD AND APPARATUS ADJUSTING PROCESSING ORDER ACCORDING TO DIRECTIVITY - An image processing apparatus may process a macro block by determining a processing order of the macro block based on a predicted directivity. The image processing apparatus may predict a directivity of the macro block based on neighboring pixel data in the macro block, determine the processing order of the macro block based on the predicted directivity, and process the macro block according to the determined processing order, thereby enhancing a data compression rate.05-03-2012
20120121198System and Method for Data Compression and Decompression in a Graphics Processing System - Methods and systems for data compression and decompression in a graphics processing system are provided. For example, in at least one embodiment, a method comprises distributing the graphics data values of a pixel block about zero to minimize redundancy, and the pixel block includes a plurality of quadrants. The method further comprises determining whether to encode the distributed graphics data values, and responsive to a determination to encode the distributed graphics data values, encoding at least one graphics data value of one of the quadrants depending on an encoding indicator. The encoding includes determining an entropy parameter and dividing each positive data value by the entropy parameter yielding an entropy part and a noise part.05-17-2012
20090034855Method for Determining Boundary Strength - A method for determining the boundary strengths of edges in a block-based digitally encoded image is disclosed. The method includes setting the boundary strength of two adjacent blocks in an Inter MB to a first strength value if any one of the two adjacent blocks contains non-zero prediction residual in the encoding data and setting the boundary strength thereof to a second strength value if the two adjacent blocks are located in the same motion compensation block. An edge with boundary strength equal to the second strength value will be skipped in a deblocking process.02-05-2009
20110129161HYBRID PREDICTION APPARATUS AND METHOD FOR ENTROPY ENCODING - Provided are a hybrid prediction apparatus and method for entropy encoding that may enhance an existing image compression scheme and prediction scheme by including and selectively using a plurality of predictors configured to perform a per-pixel prediction of an image frame, and may also supplement a performance of a prediction scheme, excessively occurring in a particular pixel.06-02-2011
20120314967REPRODUCTION APPARATUS - A reproduction apparatus includes a reproduction unit that reproduces plural moving image data having different frame rates from a recording medium, an output unit that outputs the reproduced moving image data to a display device, a setting unit that sets one of a first and a second reproduction modes, and a control unit that controls the output unit to select some of frames of the reproduced moving image data and output moving image data of the selected frames according to an instruction for high-speed reproduction. In the first reproduction mode, the control unit selects frames at a predetermined frame interval according to reproduction speed for the high-speed reproduction. In the second reproduction mode, the control unit selects frames at a frame interval determined based on the reproduction speed for the high-speed reproduction and a frame rate of the reproduced moving image data.12-13-2012
20120213449Prediction of Pixels in Image Coding - A method and arrangement for prediction of pixel values in an image decoder. In an image decoder, a reference vector which is provided by an image encoder is provided 08-23-2012
20100220936IMAGE ENCODING DEVICE, IMAGE ENCODING METHOD, IMAGE ENCODING/DECODING SYSTEM - An image encoding device comprises: a predicted value generation means for predicting target pixel data which is the pixel data of an encoding target pixel to generate predicted value data; a subtractor for calculating the difference value between the target pixel data and the predicted value data to generate difference value data; an encoding mode decision means for determining an encoding mode based on the difference value data and temporarily holding it in a buffer; an encoding target decision means for determining which data of the target pixel or the difference value is used as encoding target data to be encoded based on the encoding mode; a quantization means for applying a quantization processing to the encoding target data based on the encoding mode to generate quantized data; and a fixed-length code generation means for adding the encoding mode to the quantized data to generate a fixed-length code.09-02-2010
20100080479IMAGE DATA COMPRESSION APPARATUS AND DECODING APPARATUS - An image data compression apparatus includes: a filter coefficient calculation unit to perform a filter process to separate pixels extracted in accordance with a one-dimensional subband coding into low- and high-frequency components, and to calculate coefficient values of respective filter coefficients; prediction units to perform different predictions respectively for the calculated coefficient values; a predicted coefficient value calculation unit to calculate predicted coefficient values to be used for posterior predictions by calculating each from at least one of predicted values and from corresponding at least one of the calculated coefficient values; a memory unit to hold the predicted coefficient values calculated by the predicted coefficient value calculation unit; and a compression coding unit to calculate a difference between each predicted value and corresponding each coefficient value, and to perform coding after quantizing the difference, or to perform coding on the basis of the difference.04-01-2010
20120170859METHOD AND APPARATUS FOR REALIZING ADAPTIVE QUANTIZATION IN PROCESS OF IMAGE CODING - A method and apparatus for realizing adaptive quantization in the process of image/video coding, which includes the following steps: acquiring the parameter information of the neighbor blocks of the current block; determining the quantization mode of the current block according to the parameter information of the neighbor blocks; and performing quantization processing on transform coefficients of the current block by using the determined quantization mode. Wherein, block coding type and motion vector of the neighbor blocks are used as the parameter information for determining the quantization mode of the current block. An apparatus for adaptive quantization in process of image/video coding is provided. The invention can use different quantization mode for adaptive quantization in different image content of an image sequence, thereby improving the subjective quality of the compressed images at the same bit rate.07-05-2012
20120170858METHOD AND APPARATUS FOR ENCODING AND DECODING OF IMAGES - An encoding method for encoding of images and corresponding decoding method is disclosed, as well as an encoder and a decoder. The encoding method comprises creating, in an encoder, a residual block from an original block and a prediction block which is an approximation of the original block, wherein the created residual block comprises residual block elements. The en-coding method further comprises re-ordering, in the encoder, the residual block elements within the residual block; and applying, in the encoder, a transform to the re-ordered residual block. By re-ordering the residual block elements prior to applying a transform, an improved efficiency of the encoding may be obtained.07-05-2012
20100027901PREDICTIVE-TRANSFORM SOURCE CODING WITH SUBBANDS - A method, system, and apparatus are directed towards computing minimum mean squared error (MMSE) predictive-transform (PT) source coding integrated with subband compression to further improve the performance of low bit rate MMSE PT source coders. A desirable byproduct of the advanced scheme is that the incorporation of joint optimum prediction and transformation from subband to subband is ideally suited to its integration with JPEG2000 to yield even higher compression levels while producing an outstanding objective as well as subjective visual performance02-04-2010
20100008592IMAGE SIGNAL TRANSFORMING AND INVERSE-TRANSFORMING METHOD AND COMPUTER PROGRAM PRODUCT WITH PRE-ENCODING FILTERING FEATURES - An aspect of an image signal transforming method is a method of generating one or more transformed samples from a plurality of input samples, which includes a first transformed sample generating step of performing a first filtering process by a filter, on at least one first input sample (an input sample from a terminal) out of a plurality of first input samples used for generation of a first transformed sample, to generate first filtered data, and performing a first arithmetic process (subtraction by a subtractor) on another first input sample not used for the generation of the first filtered data (an input sample from another terminal), and the first filtered data generated, to generate the first transformed sample.01-14-2010
20090060361METHOD FOR PROCESSING A MACRO BLOCK OF IMAGE DATA - The image data are coded with field DCT or frame DCT depending on the characteristics of the image data. However different coding types will result in different boundary marks of boundaries between adjacent blocks or adjacent macro blocks. Therefore the de-blocking of a boundary between two adjacent blocks or adjacent macro blocks should be performed according to the format of image data and the coding type of the adjacent blocks or adjacent macro blocks.03-05-2009
20090060362IMAGE AND VIDEO COMPRESSION USING SPARSE ORTHONORMAL TRANSFORMS - A method and apparatus is disclosed herein for performing compression with sparse orthonormal transforms. In one embodiment, the method comprises receiving a block of data; classifying the block of data based on directional structure; selecting one of a plurality of available directional, orthonormal transforms to apply to the block based on results of classifying the block; and applying the selected transform to the block to generate a plurality of coefficients, thereby producing a compressed version of the block.03-05-2009
20120224777METHOD AND APPARATUS FOR ENCODING AN INTRA-PREDICTION MODE USING VARIABLE LENGTH CODES, AND RECORDING MEDIUM FOR SAME - The disclosure relates to a method, apparatus, and recording medium for encoding an intra-prediction mode of an image using variable length codes, including: determining an intra prediction mode of a current block; determining an intra prediction mode having smallest mode number among intra prediction modes of encoded adjacent blocks as Most Probable Mode; generating and allocating variable length codes in ascending order from shorter code with higher similarity for directivity with MPM for all intra-prediction modes; and encoding intra prediction mode of current block based on allocated variable length codes, and thereby generates efficient variable length codes in consideration of high correlation in the intra-prediction modes of current block and peripheral blocks even if intra-prediction mode of current block does not match MPM derived with reference to peripheral blocks, and efficiently compressing information on intra-prediction mode of current block using variable length codes, thereby improving intra video encoding performance.09-06-2012
20120189220APPARATUS AND METHOD FOR DATA PROCESSING - A data processing apparatus and method. A vertex grouping unit of the data processing apparatus may group, into at least one group, a plurality of vertices included in a three-dimensional (3D) object desired to be compressed. A prediction mode determination unit may determine a prediction mode for compressing a vertex position with respect to each of the at least one group. A coder may code a prediction error vector and an identification (ID) index of the prediction mode determined with respect to each of the at least one group.07-26-2012
20090016625IMAGING APPARATUS AND METHOD OF IMPROVING SENSITIVITY OF THE SAME - An imaging apparatus and a method improving the sensitivity of the imaging apparatus are provided. The imaging apparatus includes a pixel binning unit pixel binning input image data to a given pixel size; a gain determining unit determining a pixel binning gain based on the input image data or the brightness of the input image data; and a calculating unit calculating output image data based on the pixel binned input image data and the pixel binning gain. Accordingly, the resolution of input image data can be preserved and the dynamic range of an image signal under low illumination conditions can be expanded.01-15-2009
20090016626JOINT CODING OF MULTIPLE TRANSFORM BLOCKS WITH REDUCED NUMBER OF COEFFICIENTS - A system and method for video/image encoding and decoding, where transform coefficients associated with a plurality of blocks are reorganized and coded together. Various embodiments perform transform and quantization and generate transform coefficients, where the coefficients of the transform blocks are reorganized and interleaved. Additionally, an encoding process involves coding only a subset of the transform coefficients belonging to the transform blocks resulting in one or more transform blocks less than the original number of transform blocks, and putting this into a bitstream. A decoding process involves decoding the one or more resulting transform blocks including the subset of transform coefficients from the bistream, the transform coefficients being put in an array and decoded. The decoder de-interleaves the decoded transform coefficients and any remaining coefficients of the one or more transform blocks are filled in according to a plurality of different methods. After the one or more transform blocks are fully decoded, inverse transform and inverse quantization are performed and residual data is generated.01-15-2009
20090016624Method of graphics and image data compression - This image compression applies a mixture compression algorithm to code the differential value of the adjacent pixels. The first table saves a predetermined number of the most frequent patterns and the second table saves another predetermined number of the most frequent patterns and both apply fixed length code to represent the matched pattern of current pixel.01-15-2009
20090016627IMAGE COMPRESSOR, IMAGE EXPANDER AND IMAGE PROCESSING APPARATUS - An image compressor has an input pixel value correction unit, a predicted pixel value generation unit, an error level detection unit, a predicted error computation unit, a predicted error coding unit, a packing unit and a target code amount difference level detection unit. The predicted error coding unit encodes, by variable-length coding, group information indicating a group to which the magnitude of a predicted error belongs and added bit data indicating a particular predicted error value in the group, and performs encoding by removing less significant bit data according to a target code amount difference level in the added bit data for the predicted error if the magnitude of the predicted error is equal to or larger than a predetermined value.01-15-2009
20120230599Decoder and a method therof for improving decoding of image and video signals - A solution according to one or more embodiments of the present invention is to reconstruct image blocks where only the frequency coefficient that is most sensitive to changes of an average value of the residual image block, typically the lowest frequency coefficient, is present with a flat residual image. The other image blocks are reconstructed by applying an inverse spatial 2D transform. Hence, the other image blocks comprise image blocks with multiple coefficients and image blocks with a single coefficient and wherein the single coefficient is not the coefficient determining that is most sensitive to changes of an average value of the residual image block.09-13-2012
20080304760METHOD AND APPARATUS FOR ILLUMINATION COMPENSATION AND METHOD AND APPARATUS FOR ENCODING AND DECODING IMAGE BASED ON ILLUMINATION COMPENSATION - A method and apparatus for compensating for illumination of a reference block and a method and apparatus for encoding an image, using the illumination compensation method and apparatus, are provided. The method of compensating for illumination of a reference block includes: predicting the mean values of pixels of a current block and a reference block, based on restored values of pixels neighboring the current block, and restored values of pixels neighboring the reference block; and based on the predicted mean value of the pixels of the current block, the predicted mean value of the pixels of the reference block, and the values of the pixels of the current block and the reference block, determining an illumination compensation parameter.12-11-2008
20080298696BUFFER MANAGEMENT FOR AN ADAPTIVE BUFFER VALUE USING ACCUMULATION AND AVERAGING - An optical imaging system with dynamic buffer management is described. Embodiments of the optical imaging system include an image sensor, a buffer, and a buffer mode controller. The image sensor includes a pixel array to read out a plurality of pixel lines for a frame of an image. The buffer is configured to store a plurality of buffer values corresponding to a plurality of pixel values for each of the pixel lines. The buffer mode controller is configured to dynamically switch between an accumulation mode and an averaging mode. The accumulation mode facilitates a computation of each buffer value according to a sum value of the corresponding pixel value and a corresponding previous buffer value. The averaging mode facilitates a computation of each buffer value according to an average value of a normalized value of the corresponding pixel value and the corresponding previous buffer value.12-04-2008
20110002554DIGITAL IMAGE COMPRESSION BY RESIDUAL DECIMATION - Disclosed is an image encoder that divides a digital image into a set of “macroblocks.” Each macroblock is encoded by applying spatial (and possibly temporal) prediction. The “residual” of the macroblock is calculated as the difference between the predicted content of the macroblock and the actual content of the macroblock. The residual is then “decimated” by taking an orderly subset of its values. The decimated residual is then either transmitted to an image decoder or is stored for later use. To recreate the original image, the macroblocks are first recreated from their received residuals. When a decimated residual is received, the values of the residual left out during decimation are interpolated from the values actually received. Using the prediction techniques along with the residual, the original content of the macroblock is recovered. The macroblocks are then joined to form the original digital image.01-06-2011
20120321208IMAGE ENCODER AND CAMERA SYSTEM - A compression controller is capable of executing prediction mode selection for selecting any one of forward prediction, backward prediction, or bidirectional prediction as a prediction mode used for encoding based on spatial frequencies of an image to be encoded. The compression controller determines whether or not to execute the prediction mode selection based on image mobility information indicating an amount of motion in the image to be encoded.12-20-2012
20110216982IMAGE DATA COMPRESSION APPARATUS FOR REFERRING TO AT LEAST ONE CHARACTERISTIC VALUE THRESHOLD TO SELECT TARGET COMPRESSION RESULT FROM CANDIDATE COMPRESSION RESULTS OF ONE BLOCK AND RELATED METHOD THEREOF - An exemplary image data compression apparatus includes a compression circuit, a characteristic value extracting circuit, and a selecting circuit. The compression circuit is utilized for applying a plurality of different compression approaches to a first block, and accordingly generating a plurality of first candidate compression results of the first block. The characteristic value extracting circuit is coupled to the compression circuit, and utilized for deriving a plurality of first characteristic values from the first candidate compression results, respectively. The selecting circuit is coupled to the compression circuit and the characteristic value extracting circuit, and utilized for selecting a target compression result of the first block from the first candidate compression results according to the first characteristic values and at least one characteristic value threshold.09-08-2011
20110222790METHODS FOR PROCESSING 2Nx2N BLOCK WITH N BEING POSITIVE INTEGER GREATER THAN FOUR UNDER INTRA-PREDICTION MODE AND RELATED PROCESSING CIRCUITS THEREOF - A method for processing a 2N×2N block under intra-prediction includes: utilizing an intra-prediction unit for performing intra-prediction upon the 2N×2N block by utilizing a plurality of prediction modes, and accordingly generating a plurality of intra-prediction results respectively corresponding to the prediction modes, wherein N is a positive integer greater than four, and a number of the prediction modes is greater than four; and determining a target intra-prediction result from the intra-prediction results.09-15-2011
20110235931IMAGE ENCODER AND IMAGE DECODER - A division mode adapted to the characteristic of an image is enabled to be selected from among a plurality of the division modes while suppressing an increase in side information. An image encoder (09-29-2011
20110235930Image encoding and decoding apparatus and method - An image encoding and decoding apparatus and method, the image encoding and decoding apparatus includes: an encoding unit adjusting at least one weight value adaptively to the number of bits expressing each pixel of a current image, predicting a pixel value of a block of interest by performing an operation on a pixel value of at least one block having a pixel value similar to the pixel value of the block of interest among blocks included in a previous image and the at least one adjusted weight value, and encoding the pixel value of the block of interest using the predicted pixel value of the block of interest; and a decoding unit adjusting the at least one weight value adaptively to the number of bits, restoring the predicted pixel value of the block of interest by performing an operation on the pixel value of the at least one block having the pixel value similar to the pixel value of the block of interest among blocks included in the restored previous image and the at least one adjusted weight value, and decoding the pixel value of the block of interest using the restored pixel value, wherein the previous image refers to an image displayed prior to a current image, and the block of interest is a target block of interest among blocks belonging to the current image.09-29-2011
20110249908Optimized Prediction Based Image Compression - A technique for optimizing a prediction method of samples in blocks of an image is provided. The image includes a first block, a second block, a third block, and a fourth block, each of the blocks include 8×8 blocks and form one Macro block. The method includes performing a prediction of the second block, the third block and the fourth block by performing at least one of prediction methods. A prediction error per block (P10-13-2011
20120321207IMAGE CODING APPARATUS - It is an object of the present invention to provide an image coding technique for suppressing degradation in image quality, in which the time and space where intra macroblocks appear are dispersed. A numerical value (Ftk) is generated from the lower-order six bits of the frame number (Ft) of a coding object frame. A numerical value (Fs) is generated by shifting the numerical value (Ftk) leftward by two bits. An exclusive OR of the numerical value (Ftk) and the numerical value (Fs) is calculated, to thereby generate a numerical value (A). A numerical value (Ytk) is generated from the lower-order six bits of the Y coordinate (Yt) of a coding object macroblock. The upper-order bits of the numerical value (Ytk) and the lower-order bits thereof are inverted, to thereby generate a numerical value (Yr). Further, an exclusive OR of the numerical value (Yr) and the numerical value (A) is calculated, to thereby generate a numerical value (B). A numerical value (Xtk) is generated from the lower-order six bits of the X coordinate (Xt) of the coding object macroblock. When the numerical value (Xtk) and the numerical value (B) are identical to each other, the coding object macroblock is intra-coded.12-20-2012
20120328208INFORMATION PROCESSING APPARATUS, INFORMATION PROCESSING METHOD, PROGRAM, AND RECORDING MEDIUM - Provided is an information processing apparatus including a low-bit basic image generating part for generating a low-bit basic image having a low bit depth, a low-bit reference image generating part for generating a low-bit reference image having a low bit depth, a feature value calculating part for calculating a feature value indicating a non-flatness of brightness information of the basic image, a cost value calculating part for calculating a cost value at each of reference block positions in a block matching between the low-bit basic image and the low-bit reference image using the feature value and an estimated motion vector, and a block matching part for calculating a motion vector at each of the reference block positions based on an evaluation value obtained by the block matching between the low-bit basic image and the low-bit reference image after correcting the evaluation value using the calculated cost value.12-27-2012
20100177975Apparatus and method for generating coded block pattern for alpha channel image and alpha channel image encoding/decoding apparatus and method using the same - An apparatus and a method generate a coded block pattern (CBP) of an alpha channel image. An apparatus and a method encode or decode the alpha channel image using the method. The alpha channel image encoding apparatus includes a CBP generator generating a CBP of a first block corresponding to an encoding unit in the alpha channel image by allocating CBPs to a plurality of second blocks that includes the first block; and a bitstream generator generating a bitstream by encoding the CBP or the CBP and pixel values of the second blocks based on the CBP of each of second blocks.07-15-2010
20120141040METHOD OF COMPRESSING SEQUENCE OF STROKES - A method of compressing a sequence of strokes input at an input device of a processing system is provided in which each stroke input at the input device is represented as a series of digital words representing x and y co-ordinates, and a co-ordinate is expressed as an offset from a preceding co-ordinate by combining a residual error value and an estimate calculated from the previous m co-ordinates using the formula:06-07-2012
20130011075ENCODING APPARATUS AND ENCODING METHOD - According to one embodiment, an encoding apparatus includes a first quantizer, a second quantizer, a predictor and a calculator. The first quantizer quantizes an input block to obtain a first quantized block. The second quantizer quantizes a reference pixel to obtain at least one quantized value. The predictor predicts each target pixel in the first quantized block using the at least one quantized value and a quantized value of a pixel that is to be decoded preceding the target pixel in decoding order in the first quantized block to obtain a second quantized block. The calculator calculates a difference between the first quantized block and the second quantized block.01-10-2013
20080247658METHOD AND APPARATUS FOR ENCODING AND DECODING IMAGE USING MODIFICATION OF RESIDUAL BLOCK - Provided are a method and apparatus for encoding and decoding an image. In the encoding method, a residual block of a current block is transformed using a predicted block of the current block so as to increase the spatial correlation among residual values, and DCT is performed on the transformed residual block, thus improving the efficiency of transforming a block having a region that is difficult to precisely predict.10-09-2008
20080247657Method for Encoding Images, and an Image Coder - The invention relates to a method for encoding a digital image, in which method the digital image is divided into blocks (C, L, U, UL, UR). In the method a spatial prediction for a block (C) is performed to reduce the amount of information to be transmitted, wherein at least one prediction method (P10-09-2008
20080240592IMAGE ENCODING AND DECODING METHOD AND APPARATUS USING MOTION COMPENSATION FILTERING - Provided are an image encoding method and apparatus for encoding image data, in which compression efficiency is further improved by filtering motion-compensated image data, thereby reducing errors with respect to original image data, and an image decoding method and apparatus for decoding encoded image data. A filter is generated using previously decoded surrounding pixels of a current frame and surrounding pixels of a reference frame, and prediction data is then filtered using the generated filter. Therefore, it is possible to decrease a size of residual data to be encoded.10-02-2008
20080226184IMAGE FEATURE IDENTIFICATION AND MOTION COMPENSATION APPARATUS, SYSTEMS, AND METHODS - Apparatus, systems, and methods disclosed herein may estimate the magnitude of relative motion between a scene and an image capture device used to capture the scene. Some embodiments may utilize discrete cosine transform and/or Sobel gradient techniques to identify one or more blocks of pixels in an originating calibration image frame. Matching blocks of pixels may be located in a successive calibration image frame. Motion vectors originating at one calibration frame and terminating at the other calibration frame may be calculated. The magnitude of relative motion derived thereby may be used to adjust image capture parameters associated with the image capture device, including exposure settings.09-18-2008
20080226183DPCM with Adaptive Range and PCM Escape Mode - The embodiments of the present invention provide for methods, devices, and systems adapted to perform adaptive quantization processes. The adaptive quantization processes of the present invention are adapted to provide one or more adaptive quantization modes based on one or more previous pixels and their associated coding modes. The output of an adaptive quantization process may include coded data and a coding mode, indicating whether the coded data is pulse code modulation (PCM) data or differential pulse code modulation (DPCM) data.09-18-2008
20130170763IMAGE ENCODING METHOD AND APPARATUS, IMAGE DECODING METHOD AND APPARATUS, AND PROGRAMS THEREFOR - An image encoding method in which when transmitting or storing an image, a frame of the image is divided into predetermined-sized processing regions, and for each processing region, a pixel value of each pixel is predicted for the encoding. The method includes a step that determines one pixel value, which is assigned to and represents each object in the processing region, to be an object pixel value that is associated with an object identifier for identifying the relevant object; a step that generates, based on each object pixel value and the pixel value of each pixel in the processing region, an object map that indicates which object has been obtained at each pixel in the processing region, by using the object identifier; a step that generates a predicted image for the processing region by assigning the object pixel value to each pixel in accordance with the object map; a step that encodes the object map; a step that encodes each object pixel value; and a step that performs predictive encoding of an image signal for the processing region by using the predicted image.07-04-2013
20080219576Method and apparatus for encoding/decoding image - Provided are a method and apparatus for encoding/decoding an image. The method of encoding an image includes predicting pixel values in a first pixel group from among pixel groups of a block of a current image, using pixel values in a second pixel group of the block, and encoding the current image using the predicted pixel values. Accordingly, prediction efficiency can be increased by performing intra prediction using pixels in a current block.09-11-2008
20080219575Method and apparatus for faster-than-real-time lossless compression and decompression of images - The present invention is a method and apparatus for compressing and decompressing data. In particular, the present invention provides for (de-)compressing naturalistic color-image and moving-image data, including high-precision and high-definition formats, with zero information loss, one-sample latency and in faster than real time on common computing platforms, resulting in doubled transmission, storage, and playback speed and doubled transmission bandwidth and storage capacity, and hence in doubled throughput for non-CPU-bound image-editing tasks in comparison with uncompressed formats. The present invention uses a nearly symmetrical compression-decompression scheme that provides temporal, spatial, and spectral compression, using a reversible condensing/decondensing filter, context reducer, and encoder/decoder. In the preferred embodiment of the invention, the compression filter is implemented as a cascade of quasilinear feedforward filters, with temporal, multidimensional spatial, and spectral stages, where appropriate, in that order, whose support consists of adjacent causal samples of the respective image. The decompressor cascades quasilinear feedback inverse filters in the reverse order. The filters can be implemented with mere integer addition, subtraction, and either one-dimensional table lookup or constant multiplication and binary shifting, depending on the computing environment Tables permit the data precision to be constrained throughout to that of the image samples. The encoder uses a table of prefix codes roughly inversely proportional in length to their probability, while the decoder uses chunked decode tables for accelerated lookup. In the fastest and simplest mode, the code tables are context-independent. For greater power, at the cost of a reduction in speed, the code tables are based on the temporal, multidimensional spatial, and spectral adjacent causal residue samples, where contexts with similar probability distributions are incoherently collapsed by a context reducer using one-dimensional lookup tables followed by implicitly multidimensional lookup tables, to minimize the overall table size. The invention's minimal resource requirements makes it ideal for implementation in either hardware or software.09-11-2008
20130094778SYSTEM AND METHOD FOR QUALITY-AWARE SELECTION OF PARAMETERS IN TRANSCODING OF DIGITAL IMAGES - A method for quality-aware transcoding of an input image into an output image for display on a terminal having device file size and image size constraints are disclosed. The method extracts features of the input image including dimensions and file size of the input image, predicts a file size of the output image taking into account constraints of the terminal and extracted features, including selecting a set of feasible transcoding parameters so that a corresponding predicted file size of the output image meets the device file size constraint of the terminal, determines quality metric values of the output image, characterizing a measure of distortion of the input image introduced by the transcoding, corresponding to the feasible transcoding parameters in the set of feasible transcoding parameters, and selects those transcoding parameters from the set of feasible transcoding parameters, which yield the highest quality metric value. A corresponding system is also provided.04-18-2013
20130148907Guided Post-Prediction Filtering in Layered VDR Coding - A visual dynamic range (VDR) coding system creates a sequence of VDR prediction images using corresponding standard dynamic range (SDR) images and a prediction function. For each prediction image, an encoder identifies one or more areas within the prediction image suitable for post-prediction filtering. For each identified post-prediction area, a post-prediction filtering mode is selected among one or more post-prediction filtering modes. The selected post-prediction filtering mode is applied to output a filtered prediction image. Information related to the post-prediction filtering areas and the selected corresponding post-prediction filtering modes may be communicated to a receiver (e.g., as metadata) for guided post-prediction filtering. Example post-prediction filtering modes that use low-pass averaging filtering or adaptive linear interpolation are also described.06-13-2013
20120275719SELECTIVE PREDICTOR AND SELECTIVE PREDICTIVE ENCODING FOR TWO-DIMENSIONAL GEOMETRY COMPRESSION - A selective predictor utilizes a selective prediction method for coordinate data encoding. The selective predictor may calculate multiple prediction vectors for each vertex in the shape traversal order. Then, the selective predictor selects the vector that is closest to the vertex to be estimated. In determining the multiple prediction vectors, the selective predictor considers the position of several previous vertices in the traversal order. The selective predictor outputs a correction vector for the selected prediction vector and identification information indicting the selected prediction vector.11-01-2012
20120275718IMAGE COMPRESSION APPARATUS, IMAGE EXPANSION APPARATUS, AND METHODS AND PROGRAMS THEREOF - An image compression apparatus capable of compressing an input image that includes a predetermined target object at a high compression ratio while allowing high quality image restoration. In the apparatus, the input image is reduced and compressed. A region of interest corresponding to a predetermined target object is set in the input image. A partial area image of an expanded image of the compressed reduced image corresponding to the region of interest is converted to a high resolution image by applying a prediction process that uses a learning result obtained by learning the predetermined object in advance. With respect to the region of interest portion, a differential image between the image converted to the high resolution and the input image is generated and encoded. Reduced image compression data and differential image encoded data are outputted.11-01-2012
20130156335METHOD FOR ENCODING AND DECODING VIDEO, AND APPARATUS USING SAME - The present invention combines an inter-prediction method using an AMVP mode and an inter-prediction method using a merge mode so as to use the same candidates. The method for decoding video data proposed by the present invention comprises receiving mode information on an inter-prediction method of a current block, determining, on the basis of the received mode information, whether the inter-prediction method to be applied to the current block is an AMVP mode or a merge mode, and selecting a candidate to derive motion information of the current block.06-20-2013
20130182966IMAGING APPARATUS AND IMAGE PROCESSING METHOD - Disclosed is an imaging apparatus capable of, when a JPEG compression encoding is performed by dividing an image after an image processing into a plurality of blocks, simply performing the JPEG compression encoding and a combination of images after the encoding without encoding efficiency deterioration or a limitation in an image size of the block. The imaging apparatus includes an image processor for horizontally dividing image data into a plurality of blocks and supplying the blocks to an encoder without passing through a storage unit, the encoder for simultaneously storing an initiation address of a corresponding line to be encoded in a corresponding block and a data length after the corresponding line is encoded in the storage unit, and storing information used for a predictive encoding in the storage unit in every corresponding line to be encoded in the corresponding block.07-18-2013
20130182967IMAGE PROCESSING DEVICE AND IMAGE PROCESSING METHOD - There is provided an image processing device including a sorting section that sorts pixel values of common pixel positions in adjacent sub-blocks included in a block in an image in a manner that the pixel values included in the block are adjacent to one another after the sorting, and a prediction section generates a predicted pixel value for a pixel of a first pixel position of the sub-block using the pixel values sorted by the sorting section and a reference pixel value in the image corresponding to the first pixel position.07-18-2013
20110293196PICTURE ENCODING AND DECODING - Video is encoded by applying a vertically and horizontally separable transform to provide a block of transform coefficients; and quantising the transform coefficients. Prior to quantisation, a filtering operation is performed on the block of transform coefficients, the filtering operation applying a rotation to pairs of coefficients in the block. Each pair of coefficients may be symmetrically positioned with respect to the leading diagonal of the block.12-01-2011
20080310745ADAPTIVE COEFFICIENT SCANNING IN VIDEO CODING - This disclosure describes techniques for scanning coefficients of video blocks, e.g., quantized and transformed coefficients. Rather than use conventional zig-zag scanning, the techniques of this disclosure adapt the scanning order based on statistics associated with previously coded blocks that were coded in the same prediction mode. For each prediction mode, statistics of the coefficients are stored, e.g., indicating probabilities that given coefficients are zero or non-zero. Periodically, adjustments to the scanning order can be made in order to better ensure that non-zero coefficients are grouped together and zero value coefficients are grouped together, which can improve the effectiveness of entropy coding. The techniques of this disclosure provide thresholds and threshold adjustments that can reduce the frequency that the scanning order adjustments occur, yet still achieve desired improvements in compression due to such scanning order adjustments.12-18-2008
20110311153REDUCED CALCULATIONS IN DETERMINING INTRA-PREDICTION TYPE METHOD AND SYSTEM - The method, system, and apparatus of source statistics based intra prediction type is disclosed. In one embodiment, a method includes classifying a four-pixel square block in an edge class (e.g., may include a DC edge class, a vertical edge class, a horizontal edge class, a diagonal edge class, and/or a planar edge class) based on an edge classifier, classifying an eight-pixel square block having the four-pixel square block and other four-pixel square blocks as a homogenous class if the four-pixel square block and the other four-pixel square blocks of the eight-pixel square block belong to the edge class, assigning a direction to the edge class of the eight-pixel square block, and determining an optimal intra-prediction type through the classification such that empirical testing of all possible ones of the edge class and the direction is avoided when the homogenous class is identified.12-22-2011
20130188885APPARATUS AND METHOD FOR CODING IMAGE, AND NON-TRANSITORY COMPUTER READABLE MEDIUM THEREOF - According to one embodiment, a prediction unit generates a prediction block to be used for prediction of a coding target block, based on at least one reference block adjacent to the coding target block in the image. Each number of pixels in the coding target block and the prediction block is a power of two. A calculation unit calculates a residual block having residual pixel values between the coding target block and the prediction block. A decision unit decides whether to code the residual block, based on pixel values of at least one of the coding target block, the reference block and the prediction block. A coding unit codes the residual block by variable length coding, when the residual block is decided to be coded, and codes a skip flag representing the residual block not being coded when the residual block is not decided to be coded.07-25-2013
20130195372IMAGE PROCESSING APPARATUS AND METHOD - The present disclosure relates to an image processing apparatus and method, which can improve the coding efficiency while suppressing an increase in the load.08-01-2013
20130195371METHOD FOR CODING AND FOR RECONSTRUCTION OF A BLOCK OF AN IMAGE SEQUENCE AND CORRESPONDING DEVICES - A method for coding a current block is disclosed. The method comprises: 08-01-2013

Patent applications in class Predictive coding