Patent application number | Description | Published |
20090245755 | METHOD AND SYSTEM FOR IMAGE SCALING DETECTION - A method and system for image scaling detection is provided. Image scaling detection involves receiving a decoded scaled input image having a plurality of pixels, wherein the input image has a scaling ratio relative to an original image; detecting blocking boundary artifact pixels in the image; determining a sum of pixel values for each blocking boundary artifact; detecting the pixel distance value between each pair or neighboring block boundaries; and determining the scaling ratio based on a distance value and said sum of pixel values. | 10-01-2009 |
20090252405 | METHOD AND APPARATUS FOR DICTIONARY-BASED IMAGE PROCESSING - A method and system for processing a digitized image including multiple pixels is provided. Image processing involves determining a characteristic value for a set of image pixels, determining a classification for the set of pixels based on the characteristic value, accessing a dictionary including transforms, and retrieving transforms for the set of pixels based on said classification, and applying the transforms to the set of pixels to obtain output pixels. | 10-08-2009 |
20110103482 | FAST MOTION ESTIMATION APPARATUS AND METHOD BASED ON ADAPTIVE SEARCH RANGE AND PARTIAL MATCHING ERROR - Provided are fast motion estimation based on adaptive search range and partial matching error. A block dividing unit divides an original block which is set in a first image frame among successive image frames and candidate blocks into a plurality of operation units comprising the same number of pixels, respectively. A matching error calculating unit calculates a partial matching error. A matching error comparing unit replaces an optimal candidate block with a selected candidate block, when a total sum of partial matching errors calculated on all operation units of the candidate block is less than a minimum matching error being the total sum of partial matching errors calculated on all operation units of the optimal candidate block, and a maximum value of the partial matching errors calculated on all the operation units of the selected candidate block is less than a maximum matching error being a maximum value of the partial matching errors calculated on all the operation units of the optimal candidate block. | 05-05-2011 |
20110243435 | APPARATUS AND METHOD FOR COLOR DISTORTION CORRECTION OF IMAGE BY ESTIMATE OF CORRECTION MATRIX - Provided is an apparatus for correcting color distortion, including a color model generation unit configured to generate an original color model and a distortion color model, wherein the original color model includes colors which correspond to each coordinates of RGB color space and a lossy compression and color improvement operation are performed to the original color model to generate the distortion color model, a color space conversion unit configured to generate a converted original model and a converted distortion model by converting each value of the RGB color space included in the original color model and the distortion color model into color values of L*a*b* color space, a correction matrix computation unit configured to compute a correction matrix which converts each color value of the converted distortion model into each color value of the converted original model; and a color correction unit configured to correct color of a distortion image which is externally inputted by using the correction matrix. | 10-06-2011 |
20110243466 | APPARATUS AND METHOD OF ESTIMATING SCALE RATIO AND NOISE STRENGTH OF ENCODED IMAGE - An apparatus and method of estimating scale ratio and noise strength of an encoded image, the apparatus including: an edge detection unit generating an edge map including edge pixels selected based on sizes and consistency of high frequency components extracted from an input image, from among pixels of the input image obtained by encoding and decoding an original image via the block-based image compression technique; a projection histogram calculation unit calculating a horizontal histogram that indicates the number of edge pixels included in each column of the edge map, and a vertical histogram that indicates the number of edge pixels included in each row of the edge map; a distance histogram calculation unit calculating a distance histogram that is represented as the number of frequencies with respect to each of the horizontal histogram and the vertical histogram according to a size of a column distance that is a distance between two adjacent columns in which the column values are not 0 on a horizontal axis; a scale ratio estimation unit estimating a horizontal scale ratio and a vertical scale ratio of the input image with respect to the original image from the distance histogram calculated from each of the horizontal histogram and the vertical histogram based on the value of the column distance corresponding to the maximum number of frequencies; a block boundary determination unit determining a group including the maximum number of edge pixels from among a plurality of groups obtained by classifying a plurality of columns that constitute the edge map based on the horizontal scale ratio, and a group including the maximum number of edge pixels from among a plurality of groups obtained by classifying a plurality of rows that constitute the edge map based on the vertical scale ratio as a block boundary of the input image; and a noise strength estimation unit estimating strength of noise included in the input image based on edge information calculated from the group determined as the block boundary. Compressed noise, such as a block effect, included in an image can be efficiently reduced without prior information about the image. | 10-06-2011 |
20120218525 | LASER PROJECTOR AND METHOD OF PROCESSING SIGNAL THEREOF - There is disclosed a laser projector and a method of processing a signal thereof. The laser projector includes a plurality of laser sources configured to generate lasers, a controller configured to control each of the generated lasers to be incident on a specific region of a screen with a time difference, and a scanner configured to scan each of the lasers on the screen. | 08-30-2012 |
20130335458 | IMAGE PROJECTION MODULE, MOBILE DEVICE INCLUDING IMAGE PROJECTION MODULE AND METHOD FOR OPERATING THE SAME - An image projection module, a mobile device including the image projection module, and a method for operating the same are disclosed. A method for operating a mobile device including an image projection module includes splitting an input image into a left-eye image and a right-eye image in a three-dimensional (3D) image display mode, driving left-eye and right-eye light sources for outputting light having different wavelengths based on the left-eye image and the right-eye image, synthesizing light output from the left-eye light source and light output from the right-eye light source, and projecting the synthesized light in a first direction and then a second direction. Therefore, it is possible to conveniently display a three-dimensional (3D) image. | 12-19-2013 |
20140043309 | DISTANCE DETECTING DEVICE AND IMAGE PROCESSING APPARATUS INCLUDING THE SAME - A distance detecting device and an image processing apparatus including the same are disclosed. The distance detecting device includes a first light source to output a first output beam and a second light source to output a second output beam having a wavelength different from that of the first output beam, a scanner to progressively perform first directional scanning and second directional scanning to output the first output beam and the second output beam to an outside, a first detecting unit to convert a first received beam corresponding to the first output beam into a first electric signal, a second detecting unit to convert a second received beam corresponding to the second output beam into a second electric signal, and a controller to detect a distance from an external target based on the first electric signal and the second electric signal. | 02-13-2014 |
20140177968 | HOMOGRAPHY ESTIMATION APPARATUS AND METHOD - Disclosed are a homography estimation apparatus and method. A down-sampling unit reduces the reference image and the target image to the same size to generate down-sampled images. A feature point extraction unit extracts feature points from the reference image and the target image down-sampled to the same size, respectively. An outlier removal unit matches the feature points extracted from the reference image with the feature points extracted from the target image, and detects and removes outliers, which are feature points that do not match, from the matched feature points. A homography estimation unit estimates a homography using feature points from which outliers are removed. A reference image correction unit corrects the reference image using the estimated homography. | 06-26-2014 |
20140240317 | DISTANCE DETECTING DEVICE CAPABLE OF INCREASING POWER OF OUTPUT LIGHT AND IMAGE PROCESSING APPARATUS INCLUDING THE SAME - A distance detecting device and an image processing apparatus including the same are disclosed. The distance detecting device includes a light source to output light based on a first electric signal, a scanner to sequentially perform first direction a scanner to perform first direction scanning and second direction scanning to output the output light, a detecting unit to detect light received from an external target corresponding to the output light and to convert the received light into a second electric signal, and a processor to calculate a distance from the external target based on the first electric signal and the second electric signal and to control the light source to vary intensity or level of the output light. Consequently, power of light output to the external target is increased. | 08-28-2014 |
20150022783 | DISPLAY APPARATUS CAPABLE OF PROJECTING DIFFERENT IMAGES ON DISPLAY AREAS - Disclosed is a display apparatus. The display apparatus includes a light source unit configured to output a visible light, a scanner configured to output a first projection image and a second projection image based on the visible light by implementing first direction scanning and second direction scanning, and a light path splitter configured to separate light paths of the first projection image and the second projection image from each other, so as to output the first projection image and the second projection image toward a first display area and a second display area respectively. The display apparatus is capable of projecting different images onto display areas. | 01-22-2015 |
Patent application number | Description | Published |
20080247664 | SYSTEM AND METHOD FOR AN ADAPTIVE DE-BLOCKING FILTER AFTER DECODING OF COMPRESSED DIGITAL VIDEO - A system and method that adjusts the strength of a de-blocking filter to remove block artifacts in compressed video is disclosed. Block artifacts are associated with the block-based image/video compression techniques. The block artifacts deteriorate the quality of compressed image and video, especially at low bit rates. A de-blocking method estimates the strength of the block artifacts at each block boundary either directly from the MPEG decoder or from a measurement process or both, and adjusts the de-blocking parameters accordingly. An additional block content analysis improves the performance of the overall de-blocking process. | 10-09-2008 |
20080317127 | SYSTEM AND METHOD FOR CORRECTING MOTION VECTORS IN BLOCK MATCHING MOTION ESTIMATION - A system and method for processing video data is disclosed. In one embodiment, the method includes receiving a first video frame and a second video frame, where the video frames comprise a plurality of blocks of pixels. The method further includes obtaining motion vector information identifying positions of a plurality of matching blocks between the first frame and the second frame, and calculating a measure related to an angle between a first motion vector for a first block in the first frame and a second motion vector for a second block in the first frame, where the second block is located at a frame position in the first frame within a neighborhood of the frame position in the second frame identified by the first motion vector. The method further includes determining that the first and second motion vectors are conflicting based on the calculated angle measure and modifying at least one of the first motion vector and the second motion vector if the first and second motion vectors are determined to be conflicting. | 12-25-2008 |
20090074311 | SYSTEM AND METHOD FOR DETECTING VISUAL OCCLUSION BASED ON MOTION VECTOR DENSITY - A method of processing image data, comprising providing image data configured to display a first frame comprising a plurality of blocks, each block having a motion vector indicative of a change of location of the block between the first frame and a successive second frame and determining a change in state of occlusion of a first block of the plurality of blocks by reference to motion vectors having a destination in the first block. | 03-19-2009 |
20090074317 | SYSTEM AND METHOD FOR REDUCING HALO EFFECT IN IMAGE ENHANCEMENT - A method of enhancing an image, comprising providing an image having luminescence and at least one boundary, determining locations each of the at least one boundary in the image, computing an image enhancement technique having a gain for application to the image, and adjusting the gain of the image enhancement based on the luminescence values of the image near the boundary locations. | 03-19-2009 |
20090129473 | SYSTEM AND METHOD FOR ADJUSTING COMPRESSION NOISE REDUCTION BASED ON GLOBAL AND LOCAL MOTION DETECTION - A method of processing image data, comprising receiving image data, the image data discretizable into a plurality of segments and a plurality of motion vectors, each motion vector having a length and being associated with one of the plurality of segments, analyzing the motion vector of one of the plurality of segments of the image data, wherein the length of the motion vector is compared to a predetermined value, and adjusting the one segment by adjusting the degree of noise reduction applied to the image data comprising the segment. | 05-21-2009 |