Class / Patent application number | Description | Number of patent applications / Date published |
382268000 | Minimize discontinuities at boundaries of image blocks (i.e., reducing blocking effects or effects of wrap-around) | 20 |
20080199102 | Block noise detector and detection method, and block noise reducer and reduction method - A block noise detector has a spatial difference calculator that calculates differences between values of adjacent pixels. A spatial difference comparator detects edges by comparing the calculated differences. Eight counters count edges detected at different groups of positions spaced eight pixels apart in each horizontal line. The maximum count and the group of positions at which it occurs are detected at the end of each horizontal line to detect block noise and the positions of the block boundaries. The block noise detector is small in size because it only has to count edges in one line at a time, and detects edges accurately by comparing the difference at a given position separately with differences to the left and differences to the right. | 08-21-2008 |
20080240604 | Performing deblocking on pixel data - In one embodiment, the present invention includes a method for receiving pixel data for a portion of an image including a blocking artifact, calculating an artifact strength based on a difference between a two pixels on opposite sides of the blocking artifact, performing a local adaptability check using the artifact strength and values multiple pixels on the opposite sides, performing deblocking based on a result of the local adaptability check, applying a soft threshold to the artifact strength to adjust a value of the artifact strength, and re-aligning one or more pixels on the opposite sides based on the original value of the pixels and a pixel index value. Other embodiments are described and claimed. | 10-02-2008 |
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 |
20080298715 | IMAGE ANALYSIS METHOD - The present invention relates to an image analysis method for analyzing an image. By inputting starting point coordinates and ending point coordinates of individual image blocks contained in the image, an image block arrangement table is created. The image is analyzed according to the image block arrangement table. | 12-04-2008 |
20090003724 | Block noise reducer - A block noise reducer detects block boundaries in all components of an input video signal and smoothes the different components selectively on the basis of the detected block boundaries and their periodic locations. By removing block noise on the basis of block boundaries detected in color difference signals, the block noise reducer removes block noise from scenes with gradual changes in color but little or no change in luminance. | 01-01-2009 |
20090028459 | METHOD FOR REDUCING BLOCKING ARTIFACTS - A method for removing blocking artifacts from moving and still pictures, comprising classifying horizontal and vertical boundaries in each picture as blocky or non-blocky; for each blocky boundary, defining an adaptive, picture contentdependent, one-dimensional filtered pixels region of interest (ROI) that crosses the boundary and is bound at each of its ends by a bounding pixel; defining a finite filter having a length correlated with the length of the ROI; defining a filtering pixels expansion that uniquely determines the padding values of the finite length filtered pixels ROI for the finite length filtering; and filtering the ROI pixels using the finite filter and the filtering expansion. | 01-29-2009 |
20090060376 | BLOCKING EFFECT REMOVAL SYSTEM AND METHOD - A blocking effect removal system and method is provided. A blocking effect removal system, including: a pixel segment extraction unit to extract a pixel segment which satisfies a homogeneity with respect to each pixel group adjacent to a block boundary of an image; a filtering mode determination unit to determine a filtering mode corresponding to a filtering direction by considering a size of the extracted pixel segment; a direction vector determination unit to determine a direction vector which is applied to pixels adjacent to the block boundary considering the filtering mode; and a pixel segment filtering unit to filter an entire area of the pixel segment, adjacent to the block boundary, according to the filtering direction. | 03-05-2009 |
20090097775 | VISUAL PROCESSING DEVICE, VISUAL PROCESSING METHOD, PROGRAM, DISPLAY DEVICE, AND INTEGRATED CIRCUIT - It is possible to inhibit artifacts, even when a special image has been input. The visual processing device of the invention is provided with a spatial processing portion ( | 04-16-2009 |
20090214133 | IMAGE PROCESSING DEVICE AND METHOD AND PROGRAM - An image processing device configured to reduce noise of an image, including: a position control information generating unit configured to calculate a block boundary position for each of blocks and the distance of each pixel from the block boundary position, based on block size information and block boundary initial position, and generate position control information of said pixels; a block noise detecting unit configured to detect block noise feature information at said block boundary position, based on said position control information; and a noise reduction processing unit configured to reduce noise for each of said blocks, based on said block noise feature information. | 08-27-2009 |
20090220169 | IMAGE ENHANCEMENT - A bilateral filter is implemented to allow a digital image to be enhanced while mitigating the formation of ringing artifacts or halos within the image. The bilateral filter allows the digital image to be decomposed into a detail feature image and a large-scale feature image, where the image's textures are primarily comprised within the detail image, and the image's edges are primarily comprised within the large-scale feature image. By decomposing the image into these two sub-images and then globally scaling their respective magnitudes, it is possible to adjust the textures within the image substantially independent of the edges in the image and vice versa. This allows the apparent amount of texture in the scene to be enhanced while mitigating the formation of ringing artifacts or halos around edges in the image. | 09-03-2009 |
20090310882 | METHOD, APPARATUS AND INTEGRATED CIRCUIT CAPABLE OF REDUCING IMAGE RINGING NOISE - A method for reducing image ringing noise includes: (a) calculating a line spread function value of each pixel's luminance in an input image; (b) dividing the input image into a plurality of blocks, and calculating an average value and a maximum value of the line spread function values for all the pixels in each of the blocks; (c) based on the average value and the maximum value of the line spread function values for of each of the blocks, determining whether each of the blocks is an interfered flat block or a non-interfered block; (d) setting the pixels in the interfered flat block as a noisy pixels; (e) determining whether each pixel in the non-interfered block is an edge pixel or a non-edge pixel, and setting each the non-edge pixels in the non-interfered block as a noisy pixels; and (f) performing smoothing on each of the noisy pixels thus set, and combining smoothed pixels with the edge pixels for output as an output image. | 12-17-2009 |
20100002953 | DETECTION AND REDUCTION OF RINGING ARTIFACTS BASED ON BLOCK-GRID POSITION AND OBJECT EDGE LOCATION - The invention proposes a method (FIG. | 01-07-2010 |
20100061652 | IMAGE PROCESSING DEVICE AND IMAGE PROCESSING METHOD - An image processing device includes: an estimating module configured to estimate boundaries of blocks in an input image; a characteristic value calculating module configured to calculate a characteristic value of a subject pixel group having constituent pixels including a pixel in the frame and at least one pixel that is adjacent to the pixel by calculating a degree of pixel value dispersion between the constituent pixels of the subject pixel group if all the constituent pixels belong to the same block; an strength value calculating module configured to calculate, from the characteristic value, a strength value to be used in performing pixel value smoothing; and a smoothing module configured to perform the pixel value smoothing according to the strength value. | 03-11-2010 |
20100150470 | SYSTEMS AND METHODS FOR DEBLOCKING SEQUENTIAL IMAGES BY DETERMINING PIXEL INTENSITIES BASED ON LOCAL STATISTICAL MEASURES - Systems and methods are presented for improving the quality of an image as perceived by the Human Vision System by smoothing block artifacts in an image. In one embodiment, smoothing is accomplished by identifying target pixels to be smoothed and then replacing the pixel values of the target pixels with values derived from statistically similar neighboring pixels. The statistically similar neighboring pixels are chosen based on specific measurement criteria from within a region identified to contain such neighbors. | 06-17-2010 |
20100177983 | DEBLOCK METHOD AND IMAGE PROCESSING APPARATUS - A deblock method for processing at least one image including a plurality of pixels. The method comprises the step of determining a shift amount of block boundary by pixel data differences between adjacent pixels and thereby determining block boundaries between macroblocks in the image, and the step of optionally performing a deblock process on the block boundaries. | 07-15-2010 |
20130156339 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - The picture quality of captured images can be improved with the degradation of clearness of image-captured object boundaries suppressed. An image processing apparatus ( | 06-20-2013 |
20160042498 | SYSTEM AND METHOD FOR INCREASING THE BIT DEPTH OF IMAGES - A method for processing an image having a first bit depth includes performing two or more iterations of a bit depth enhancement operation that increases the bit depth of the image to a second bit depth that is higher than the first bit depth. The bit depth enhancement operation includes dividing the image into a plurality of areas, performing an edge detection operation to identify one or more areas from the plurality of areas that do not contain edge features, and applying a blur to the one or more areas from the plurality of areas that do not contain edge features. In a first iteration of the of the bit depth enhancement operation, the plurality of areas includes a first number of areas, and the number of areas included in the plurality of areas decreases with each subsequent iteration of the bit depth enhancement operation. | 02-11-2016 |
20160132998 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - Provided is an image processing apparatus including a preprocessor configured to determine, based on an input image signal being input, a calculation range of calculation of detecting a direction of an edge in an image which the input image signal represents; and an edge direction detection unit configured to perform calculation within the calculation range determined based on the input image signal and detect the direction of the edge. | 05-12-2016 |
20170237994 | Method of Generating a Blockiness Indicator for a Video Signal | 08-17-2017 |
20180025472 | Target-Less Auto-Alignment of Image Sensors in a Multi-Camera System | 01-25-2018 |