Minimize Discontinuities At Boundaries Of Image Blocks (i.e., Reducing Blocking Effects Or Effects Of Wrap-around) Patents (Class 382/268)
  • Patent number: 10388021
    Abstract: An image processing apparatus includes a hardware processor that: divides each of pixels of image data in units of blocks, and compresses the image data using a maximum value and a minimum value of a pixel value in each of the divided blocks; extracts a maximum value and a minimum value of each of the blocks from the compressed image data; detects an edge of an object on the basis of at least one of the extracted maximum value and the minimum value of each of the blocks; performs edge correction of the compressed image data by increasing or decreasing the maximum value and the minimum value of each of the blocks within a correction range from the detected edge; and decompresses the image data that have undergone edge correction, using the maximum value and the minimum value of each of the blocks.
    Type: Grant
    Filed: July 19, 2017
    Date of Patent: August 20, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventor: Daisuke Genda
  • Patent number: 10375417
    Abstract: The present invention relates to an advantageous scheme for boundary strength derivation and decision processing related to deblocking filtering. More particularly, the present invention improves schemes for deciding deblocking and selecting appropriate deblocking filters known in the art so as to reduce the number of calculation cycles and required memory space.
    Type: Grant
    Filed: December 13, 2018
    Date of Patent: August 6, 2019
    Assignee: Sun Patent Trust
    Inventors: Thomas Wedi, Anand Kotra, Matthias Narroschke, Semih Esenlik
  • Patent number: 10321130
    Abstract: Deblocking filters used in video coding systems (e.g., single layer video coding systems or multi-layer video coding systems) may be enhanced. Inter layer prediction for scalable video coding (SVC) may be implemented using enhanced deblocking filters. Enhanced deblocking filters may be configured to be adapted, for example by adjusting a deblocking filter boundary strength calculation process. A deblocking filter boundary strength parameter may be assigned in accordance with, for example, a video block partition size of an input video block or a neighboring video block, whether an input video block or a neighboring video block was predicted using an inter layer reference, and/or whether at least one of an input video block or a neighboring video block have one or more corresponding base layer blocks that were coded using intra mode.
    Type: Grant
    Filed: January 7, 2014
    Date of Patent: June 11, 2019
    Assignee: VID SCALE, Inc.
    Inventors: Jie Dong, Yan Ye, Xiaoyu Xiu, Yuwen He
  • Patent number: 10244265
    Abstract: A value of a deblocking parameter is determined for a picture (40) based on a depth of the picture (40) in a hierarchical coding structure of multiple pictures (40) in a video sequence (1). The determined value is encoded to form an encoded value that is sent to a decoder (85, 95, 400, 500, 600, 800) for use therein during decoding. The embodiments thereby reduces blocking artifacts, which otherwise can occur in video sequences with hierarchical coding structures, such as for QP toggling and multilayer/view video, by determining deblocking parameter values based on picture depth in the hierarchical coding structure.
    Type: Grant
    Filed: October 2, 2013
    Date of Patent: March 26, 2019
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventor: Andrey Norkin
  • Patent number: 10230935
    Abstract: A method and a system for generating depth information associated with an image. The system comprises a segmentation module arranged to identify a plurality of objects represented by the image, wherein each object adjacent to another object are identified by an edge arranged to substantially separate the object and the adjacent object; and a processing module arranged to generate the depth information by assigning a depth value for each of the plurality of objects, wherein the depth value is arranged to represent a distance between the object and a reference point in a three-dimensional space.
    Type: Grant
    Filed: January 12, 2017
    Date of Patent: March 12, 2019
    Assignee: Marvel Digital Limited
    Inventors: Ying Chiu Herbert Lee, Wai Keung Cheung
  • Patent number: 10194174
    Abstract: The present invention relates to an advantageous scheme for boundary strength derivation and decision processing related to deblocking filtering. More particularly, the present invention improves schemes for deciding deblocking and selecting appropriate deblocking filters known in the art so as to reduce the number of calculation cycles and required memory space.
    Type: Grant
    Filed: March 12, 2018
    Date of Patent: January 29, 2019
    Assignee: SUN PATENT TRUST
    Inventors: Thomas Wedi, Anand Kotra, Matthias Narroschke, Semih Esenlik
  • Patent number: 10089732
    Abstract: An image processing apparatus for detecting a singular point from image data having a plurality of pixel signals arranged in a two-dimensional manner, having a stochastic resonance processing unit configured to perform parallel steps in each of which a noise is added to and the result is subjected to binarization processing, synthesize the results of the parallel steps and output the result, with regard to each of the plurality of pixel signals; and a unit configured to detect the singular point based on the output signal value from the stochastic resonance processing unit for each of the plurality of pixel signals. The stochastic resonance processing unit performs the binarization processing on a pixel as a processing target among the plurality of pixel signals based on the pixel signal of the pixel as the processing target and a pixel signal of a pixel adjacent to the pixel as the processing target in a predetermined direction.
    Type: Grant
    Filed: April 21, 2017
    Date of Patent: October 2, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Tomokazu Ishikawa, Wakako Tanaka, Tetsuya Suwa, Shinjiro Hori
  • Patent number: 10045045
    Abstract: According to exemplary embodiments of the present invention, references to a motion vector in a neighboring block of an enhancement layer or in a block of a previously coded picture, and a motion vector of a base layer are equally handled. Accordingly, a motion_prediction_flag with identification information can be integrated for further improved coding efficiency.
    Type: Grant
    Filed: December 27, 2016
    Date of Patent: August 7, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Mitsuru Maeda
  • Patent number: 10021428
    Abstract: The present invention relates to an advantageous scheme for boundary strength derivation and decision processing related to deblocking filtering. More particularly, the present invention improves schemes for deciding deblocking and selecting appropriate deblocking filters known in the art so as to reduce the number of calculation cycles and required memory space.
    Type: Grant
    Filed: January 19, 2017
    Date of Patent: July 10, 2018
    Assignee: SUN PATENT TRUST
    Inventors: Thomas Wedi, Anand Kotra, Matthias Narroschke, Semih Esenlik
  • Patent number: 9961371
    Abstract: An image processing method of performing filtering on image blocks using a plurality of deblocking filters having different filter strengths includes: a first parameter calculating step of calculating a first parameter indicating a boundary strength; a second parameter calculating step of calculating a second parameter indicating a limit value for each of the deblocking filters, based on the first parameter and a quantization parameter; and a selecting step of selecting a deblocking filter to be used in the filtering from among the deblocking filters, using one or more threshold values which are determined based on the second parameter.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: May 1, 2018
    Assignee: SUN PATENT TRUST
    Inventors: Matthias Narroschke, Thomas Wedi
  • Patent number: 9912925
    Abstract: Systems and/or methods for estimating color conversion components. A video coding device may receive a picture associated with a first color space. The picture may comprise a first component at a first sampling location, a second component at a second sampling location and the second component at a third sampling location. The video coding device may apply a first interpolation filter to the second component at the second sampling location and the second component at the third sampling location to determine the second component at the first sampling location. The second component at the first sampling location may be associated with the first color space. The video coding device may apply a color conversion model to the first component at the first sampling location and to the second component at the first sampling location to translate the first component at the first sampling location to a second color space.
    Type: Grant
    Filed: December 12, 2014
    Date of Patent: March 6, 2018
    Assignee: VID SCALE, Inc.
    Inventors: Yan Ye, Jie Dong, Yuwen He
  • Patent number: 9773183
    Abstract: A method and apparatus are provided for automatically assessing a resolution of an optical sensor. An image is obtained from the sensor. The obtained image is thresholded to generate a binary image of black and white pixels using a first threshold value. A target area is selected from the binary image. The first threshold value is increased to generate a second threshold value. The target is thresholded using the second threshold value. At least one pixel is tagged at a center of the target area. Pixels surrounding a tagged pixel are processed, tagging white pixels. If a tagged pixel is at an edge of the target area, an orientation of an object in the target area is determined based on that edge. And, if no pixel is tagged at the edge of the target area, the second threshold value is decreased and the thresholding, tagging, and processing steps are repeated.
    Type: Grant
    Filed: May 5, 2016
    Date of Patent: September 26, 2017
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Alan R Pinkus, David W Dommett, Harry Lee Task
  • Patent number: 9729879
    Abstract: A method and apparatus for improved deblocking filter are disclosed. In one embodiment according to the present invention, determining the non-zero transform coefficients existence for a PU-only boundary is skipped and therefore the deblocking filter for PU-only boundary is eliminated if the condition of boundary strength equal to 1 is not fulfilled to avoid unnecessary deblocking. In another embodiment of the present invention, three gradients are determined for two pixel lines and filter ON/OFF decision is made based on the three gradient values of the two pixel lines. One aspect of the invention is related to filter strength selection between strong and weak filters. According to one embodiment, the filter strength selection is based on various gradient values of a pixel line across the block boundary. Another aspect of the invention is related to the weak filter.
    Type: Grant
    Filed: March 6, 2012
    Date of Patent: August 8, 2017
    Assignee: HFI INNOVATION INC.
    Inventors: Jicheng An, Xun Guo, Qian Huang, Shaw-Min Lei
  • Patent number: 9667978
    Abstract: The present invention relates to deblocking filtering, which may be advantageously applied for block-wise encoding and decoding of image or video signal. In particular, the present invention relates to performing an efficient and accurate decision on whether or not to apply deblocking filtering on an image block. The efficient and accurate decision is achieved by performing individual decisions on whether or not to apply deblocking filtering for segments of a boundary between adjacent image blocks, wherein the individual decision are based on pixels comprised in a subset of the pixel lines that the image blocks are composed of.
    Type: Grant
    Filed: December 14, 2016
    Date of Patent: May 30, 2017
    Assignee: SUN PATENT TRUST
    Inventors: Matthias Narroschke, Thomas Wedi, Semih Esenlik
  • Patent number: 9591306
    Abstract: The present invention relates to an advantageous scheme for boundary strength derivation and decision processing related to deblocking filtering. More particularly, the present invention improves schemes for deciding deblocking and selecting appropriate deblocking filters known in the art so as to reduce the number of calculation cycles and required memory space.
    Type: Grant
    Filed: September 4, 2013
    Date of Patent: March 7, 2017
    Assignee: SUN PATENT TRUST
    Inventors: Thomas Wedi, Anand Kotra, Matthias Narroschke, Semih Esenlik
  • Patent number: 9560355
    Abstract: The present invention relates to deblocking filtering, which may be advantageously applied for block-wise encoding and decoding of image or video signal. In particular, the present invention relates to performing an efficient and accurate decision on whether or not to apply deblocking filtering on an image block. The efficient and accurate decision is achieved by performing individual decisions on whether or not to apply deblocking filtering for segments of a boundary between adjacent image blocks, wherein the individual decision are based on pixels comprised in a subset of the pixel lines that the image blocks are composed of.
    Type: Grant
    Filed: February 24, 2012
    Date of Patent: January 31, 2017
    Assignee: SUN PATENT TRUST
    Inventors: Matthias Narroschke, Thomas Wedi, Semih Esenlik
  • Patent number: 9489750
    Abstract: The disclosed technology relates to image-capturing methods. In one aspect, a method includes receiving an image frame comprising a plurality of pixels and subtracting foreground pixels from the image frame to obtain background pixels. The method additionally includes determining an exposure condition for a next image frame based on at least a subset of the background pixels. The method further includes adjusting the foreground pixels such that a difference between a background luma value and a foreground luma value of the next image frame is within a predetermined range. Aspects are also directed to apparatuses configured for the methods.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: November 8, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Ruiduo Yang, Shuxue Quan, Ning Bi
  • Patent number: 9472000
    Abstract: Systems and methods for tomographic reconstruction of an image include systems and methods for producing images from k-space data. A k-space data set of an imaged object is acquired using know k-space data acquisition systems and methods. A portion of the k-space data set is sampled so as to collect some portion of the k-space data. An image is then reconstructed from the collected portion of the k-space data set according to a convex optimization model.
    Type: Grant
    Filed: June 17, 2010
    Date of Patent: October 18, 2016
    Assignee: ViewRay Technologies, Inc.
    Inventors: James F. Dempsey, Qingguo Zeng, Roger Nana, John L. Patrick, Timothy P. Eagan, Shmaryu M. Shvartsman
  • Patent number: 9326007
    Abstract: Digital noise removal methods and systems for picture quality improvement on next generation high quality set-top-box and digital TV SOCs is disclosed with particular to a de-blocking method and system that is effective on on-grid and off-grid blocky artifacts generated by lossy video compression standards. Blocky artifacts are filtered by extracting motions vectors for a current pixel block, calculating off-grid positions based on the extracted motion vectors, and applying de-blocking filtering along the calculated off-grid positions. The methods and systems can further skip filtering on-grid blocky artifacts to be filtered by an on-grid de-blocking filter known in the art.
    Type: Grant
    Filed: November 10, 2011
    Date of Patent: April 26, 2016
    Assignee: STMICROELECTRONICS ASIA PACIFIC PTE. LTD.
    Inventors: Xiaoyun Deng, Patricia Wei Yin Chiang, Lucas Hui
  • Patent number: 9264721
    Abstract: A video encoding/decoding apparatus, a deblocking filter and filtering method based on intra-prediction directions for same, and recording media are disclosed, and the deblocking filter includes: a boundary strength determiner for determining strength of boundary of current block; an intra-block identifier for confirming intra-block identity of a subblock enclosing first pixel at a certain location with reference to the boundary; an intra-prediction direction identifier for identifying an intra-prediction direction of the subblock if the subblock is identified as an intra-block; a filtering pixel selection unit for selecting pixels for filtering based on the first pixel and the identified intra-prediction direction; and a filtering unit for filtering in horizontal direction, vertical direction, or diagonal direction depending on the intra-prediction direction and relationships between pixel values of the selected pixels to eliminate deblocking artifacts within diagonal edges at a boundary between blocks by de
    Type: Grant
    Filed: October 16, 2009
    Date of Patent: February 16, 2016
    Assignee: SK TELECOM CO., LTD.
    Inventors: Hayoon Kim, Yoonsik Choe, Yonggoo Kim, Yungho Choi, Jinwoo Jeong
  • Patent number: 9232223
    Abstract: A method for decoding a stream of coded data representative of a sequence of pictures is described. The method comprises the following steps: decoding at least one part of the stream into decoded data, selecting a brightness variation model representative of a brightness variation between the pictures of the sequence from a set of at least two brightness variation models, and reconstructing the picture data from decoded data by taking into account the brightness variation model. A method for coding a picture sequence and a data structure are further disclosed.
    Type: Grant
    Filed: January 29, 2010
    Date of Patent: January 5, 2016
    Assignee: THOMSON LICENSING
    Inventors: Edouard Francois, Dominique Thoreau, Fabien Racape
  • Patent number: 9189877
    Abstract: Provided is an image processing device including a corresponding pixel computation unit configured to, with respect to image data containing an image data area and an ignored area, replace a pixel in the ignored area having influence on a spatial analysis process with a pixel having no influence on the spatial analysis process.
    Type: Grant
    Filed: January 8, 2013
    Date of Patent: November 17, 2015
    Assignee: Hitachi Solutions, Ltd.
    Inventor: Akira Kurosawa
  • Patent number: 9153041
    Abstract: An image coding device including: an edge detecting section configured to perform edge detection using an image signal of a reference image for a coding object block; a transform block setting section configured to set transform blocks by dividing the coding object block such that a boundary between the blocks after division does not include an edge on a basis of a result of the edge detection; and a coding processing section configured to generate coded data by performing processing including an orthogonal transform of each of the transform blocks.
    Type: Grant
    Filed: August 15, 2013
    Date of Patent: October 6, 2015
    Assignee: SONY CORPORATION
    Inventors: Kazuhiro Shimauchi, Yuji Wada, Hiroshi Ikeda, Daisuke Tahara
  • Patent number: 9154809
    Abstract: Disclosed is a high-resolution video encoding/decoding method and apparatus. The video encoding method includes: predicting a current block to generate a predicted block, subtracting the predicted block from the current block to generate a residual block, determining a transform and quantization type according to the block type of the current block; transforming and quantizing the residual block according to the determined transform and quantization type; and encoding the transformed and quantized residual block. According to the video encoding/decoding method and apparatus, not only the encoding efficiency can be improved because it enables an encoding using a high correlation between temporally/spatially adjacent pixels appearing in a video, but the compression efficiency can also be improved by reducing block distortion.
    Type: Grant
    Filed: September 3, 2010
    Date of Patent: October 6, 2015
    Assignee: SK TELECOM CO., LTD.
    Inventors: Sunyeon Kim, Jeongyeon Lim, Yunglyul Lee, Joohee Moon, Byeungwoo Jeon, Haekwang Kim, Jeonghoon Seo, Kioh Kim, Sungwook Hong
  • Patent number: 9088786
    Abstract: Provided is an image processing device including a decoding section configured to decode an image from an encoded stream, a horizontal filtering section configured to apply a deblocking filter to a vertical block boundary within an image to be decoded by the decoding section, a vertical filtering section configured to apply a deblocking filter to a horizontal block boundary within an image to be decoded by the decoding section, and a control section configured to cause the horizontal filtering section to filter in parallel a plurality of vertical block boundaries included in a processing unit containing a plurality of coding units and cause the vertical filtering section to filter in parallel a plurality of horizontal block boundaries included in the processing unit.
    Type: Grant
    Filed: July 19, 2013
    Date of Patent: July 21, 2015
    Assignee: SONY CORPORATION
    Inventors: Masaru Ikeda, Junichi Tanaka, Yoshitaka Morigami
  • Patent number: 9077990
    Abstract: Systems and methods are provided for determining characteristics of video data. A frame of video data is obtained, where the frame is represented by pixel data. A value is assigned to an element of a detection array based on pixel data in a portion of the video frame corresponding to the element. A frequency transform of values of the detection array is determined, and a characteristic of the video data is extracted based on the output of the frequency transform.
    Type: Grant
    Filed: February 9, 2011
    Date of Patent: July 7, 2015
    Assignee: Marvell World Trade Ltd.
    Inventors: Byas Muni, Sujith Srinivasan
  • Patent number: 9030539
    Abstract: This invention is to provide an image processing apparatus, an image processing method, a program, and a display in which both of a secret image and a public image can be efficiently displayed with high picture quality without reducing contrast of the public image. One of output images is a secret image which displays an input secret image as one of input images in a partial area of a screen, all the output images including the secret image have a relationship to become, when a luminance value of each pixel thereof is totaled, an input public image as one of the input images; and during a period in which at least the secret image is being outputted, shutter glasses disposed between a display to which the image signals are inputted and user's eyes are set to a light transmission state.
    Type: Grant
    Filed: June 10, 2014
    Date of Patent: May 12, 2015
    Assignee: NEC Corporation
    Inventors: Daigo Miyasaka, Masao Imai, Fujio Okumura
  • Patent number: 9020046
    Abstract: Apparatus, systems and methods for adaptively reducing blocking artifacts in block-coded video are disclosed. In one implementation, a system includes processing logic at least capable of deblock filtering at least a portion of a line of video data based, at least in part, on edge information and texture information to generate at least a portion of a line of deblocked video data, and an image data output device responsive to the processing logic.
    Type: Grant
    Filed: August 6, 2013
    Date of Patent: April 28, 2015
    Assignee: Intel Corporation
    Inventors: Jorge E. Caviedes, Mahesh M. Subedar, Khasim S. Dudekula
  • Patent number: 9002136
    Abstract: A denoising apparatus comprising an image input unit which receives pixel data including color information of pixels included in a correction target image, a denoising unit which denoises the pixel data by a weight based averaging method, wherein the weight is set to a maximum value when a difference value between a correction target block and a comparison target block in the correction target image is zero, decreases linearly to zero as the difference value increases until it reaches a threshold value, and is set to zero when the difference value is greater than or equal to the threshold value, and an image output unit which outputs the pixel data processed by the denoising unit. The denoising unit assigns a corrected weight value to at least a guaranteed number of comparison target blocks for an impulse block, where an impulse block is a correction target block for which the number of non-zero weight valued comparison target blocks is less than a predetermined guaranteed number.
    Type: Grant
    Filed: May 8, 2013
    Date of Patent: April 7, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Evgeny Artyomov, German Voronov, Jong-Hwa Lee
  • Patent number: 8983225
    Abstract: A method of coding a moving picture is provided that reduces blocking artifacts. The method can include defining a plurality of defining pixels S0, S1, and S2, which are centered around a block boundary. If a default mode is selected then frequency information of the surroundings of the block boundary is obtained. A magnitude of a discontinuous component in a frequency domain belonging to the block boundary is adjusted based on a magnitude of a corresponding discontinuous component selected from a pixel contained entirely within a block adjacent the block boundary. The frequency domain adjustment is then applied to a spatial domain. Or, a DC offset mode can be selected to reduce blocking artifacts in smooth regions where there is little motion.
    Type: Grant
    Filed: October 5, 2009
    Date of Patent: March 17, 2015
    Assignee: LG Electronics Inc.
    Inventors: Hyun Mun Kim, Jong Beom Ra, Sung Deuk Kim, Young Su Lee
  • Patent number: 8971419
    Abstract: The present invention relates to a deblocking filtering method, a method for inducing bs (boundary strength) therefor, and a method and an apparatus for encoding/decoding using the same. The method for inducing the bS of the present invention comprises the steps of: inducing a boundary of a deblocking filtering unit block as a unit block for applying the deblocking filtering; and setting the bS according to each bS setting unit block within the deblocking filtering unit block, wherein the bS setting step can set a bS value for a target boundary corresponding to a boundary of the deblocking filtering unit block as the bs setting unit block.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: March 3, 2015
    Assignee: LG Electronics Inc.
    Inventors: Seungwook Park, Jaehyun Lim, Yongjoon Jeon, Chulkeun Kim, Jungsun Kim, Naeri Park, Hendry Hendry, Byeongmoon Jeon, Joonyoung Park
  • Patent number: 8953877
    Abstract: Implementations relate to estimating noise in images. In some implementations, a method includes extracting a plurality of sample blocks of pixels from a received image, where each sample block includes a subset of pixels of the image. One or more of the sample blocks are examined for texture content based on whether the sample blocks include one or more edges based on a predetermined threshold. At least one sample block determined to include texture content is removed. The method determines one or more average color variances based on the remaining sample blocks that have not been removed, where noise estimations for the image are based on the average color variances.
    Type: Grant
    Filed: May 14, 2013
    Date of Patent: February 10, 2015
    Assignee: Google Inc.
    Inventor: Sevket Derin Babacan
  • Patent number: 8938122
    Abstract: An image processing apparatus includes a small area divider that divides, on the basis of edge information of an image, the image into multiple small areas each including multiple pixels; an attribute probability estimator that estimates attribute probability for each of the small areas, which is probability that the small area is attributed to a specific area to be detected; an adjacent-small-area connection strength calculator that calculates connection strength that quantitatively indicates a degree to which small areas adjacent to each other among the multiple small areas are attributed to the same area that is the specific area or a non-specific area; and a specific area detector that detects the specific area on the basis of the attribute probability and the connection strength.
    Type: Grant
    Filed: May 4, 2012
    Date of Patent: January 20, 2015
    Assignee: Olympus Corporation
    Inventors: Yamato Kanda, Makoto Kitamura, Masashi Hirota, Takashi Kono, Takehiro Matsuda
  • Patent number: 8934549
    Abstract: A method and apparatus for decoding an image are provided. The method includes: decoding information representing that a first block of the image has been encoded in a first mode; and reconstructing the first block by setting pixel values of the first block to be identical with pixel values of a second block of the image that is adjacent to the first block and has been decoded prior to the first block, wherein the first mode is a mode for encoding information representing that the first block is identical or similar to the second block and has been encoded in the first mode, instead of encoding the pixel values of the first block.
    Type: Grant
    Filed: September 17, 2010
    Date of Patent: January 13, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sung-bum Park, Jung-woo Kim, Dai-woong Choi, Jae-won Yoon, Jun-ho Cho
  • Patent number: 8929678
    Abstract: A method is provided for automatic contour filter positioning for medical X-ray imaging in an X-ray apparatus comprising a collimator and at least one movable contour filter actuated by a motor based positioning subsystem, wherein a digital image in a frame of rows and columns of pixels is rendered for processing and obtaining control data for applying a contour filter. The method comprises identifying exposure of subareas, preparing for filter positioning, and defining filter position.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: January 6, 2015
    Assignee: General Electric Company
    Inventor: Tamás Újvári
  • Patent number: 8923622
    Abstract: A method and system for orientation compensation of a mobile device within an environment includes providing a plurality of reference markers having straight edges and having a defined, regular orientation with respect to the environment. Information about the orientation of the reference markers is supplied to a mobile device operating within the environment. An orientation sensor disposed within the mobile device estimates an orientation of the mobile device. An image of one reference marker is captured, and at least one edge of that reference marker is located. The estimated orientation is compensated by correcting for the reference marker orientation and aligning the corrected estimated orientation to the at least one edge of the reference marker that is closest to being parallel to the corrected estimated orientation.
    Type: Grant
    Filed: December 10, 2012
    Date of Patent: December 30, 2014
    Assignee: Symbol Technologies, Inc.
    Inventors: Michael O'Haire, Russell E. Calvarese
  • Patent number: 8902470
    Abstract: An image processing apparatus includes: a multi-level unit that applies a multi-level process on binary halftone dot image data indicating a binary halftone dot image, to form multi-level image data; an acquiring unit that acquires a number of screen lines of the binary halftone dot image data; a tone correcting unit that determines a tone correction amount corresponding to the number of screen lines of the binary halftone dot image data acquired by the acquiring unit, and that applies tone correction on the multi-level image data produced by the multi-level unit, by using the determined tone correction amount; and a re-binarizing unit that binarizes the multi-level image data in which the tone is corrected by the tone correcting unit, without changing a halftone dot shape of the binary halftone dot image data, to produce re-binarized halftone dot image data.
    Type: Grant
    Filed: April 19, 2013
    Date of Patent: December 2, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Toru Misaizu, Kenji Hara, Shigeru Arai, Kota Matsuo
  • Patent number: 8897591
    Abstract: Methods for reducing blocking artifacts at the boundary between adjacent blocks reconstructed from a frame of compressed video information are disclosed herein. The frame includes a prediction stage parameter and a residual error attribute with respect to at least one of the blocks. One method includes reconstructing the at least one block based on the prediction stage parameter and the residual error attribute, categorizing the at least one reconstructed block into one of a plurality of categories based on the prediction stage parameter and the residual error attribute, identifying a filter strength value for the category in which the at least one reconstructed block is categorized based on at least one of the prediction stage parameter or the residual error attribute associated with that category, and filtering the boundary adjacent to the at least one reconstructed block using the identified filter strength value.
    Type: Grant
    Filed: November 29, 2012
    Date of Patent: November 25, 2014
    Assignee: Google Inc.
    Inventors: Paul Wilkins, James Bankoski, Yaowu Xu
  • Patent number: 8891609
    Abstract: Embodiments include systems and methods of measuring a blockiness level in video data that has been encoded and decoded. In one embodiment, a Q-value is calculated that indicates the blockiness level of a decompressed image. The Q-value can be based on a block map having indicators corresponding to each of a plurality of pixels in an input image, each indicator signaling if a block edge is present at the corresponding pixel location in the input image, and also based on block locations indicative of the alignment block edge locations in the input image. The Q-value can be calculated in a vertical direction and a horizontal direction with respect to the input image. The Q-value is determined based on a flatness measurement of pixel values around certain considered pixels in the input image. The Q-value can be provided to a deblocking filter to improve the performance of deblocking the input image.
    Type: Grant
    Filed: March 24, 2009
    Date of Patent: November 18, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Surapong Lertrattanapanich, Yeong-Taeg Kim
  • Patent number: 8885969
    Abstract: The present invention relates to a method and a corresponding apparatus for detecting coding artifacts in an image. The proposed apparatus comprises an edge position detector that detects an edge position of an edge in said image, a border position detector that detects a border position of a border between a texture area and a flat area in said image, and an artifact position defining unit that defines the area between said edge position and said border position as artifact area potentially comprising coding artifacts.
    Type: Grant
    Filed: March 22, 2011
    Date of Patent: November 11, 2014
    Assignee: Sony Corporation
    Inventors: Paul Springer, Frank Moesle, Zhichun Lei, Matthias Brueggemann
  • Patent number: 8848044
    Abstract: This invention is to provide an image processing apparatus, an image processing method, a program, and a display in which both of a secret image and a public image can be efficiently displayed with high picture quality without reducing contrast of the public image. One of output images is a secret image which displays an input secret image as one of input images in a partial area of a screen, all the output images including the secret image have a relationship to become, when a luminance value of each pixel thereof is totaled, an input public image as one of the input images; and during a period in which at least the secret image is being outputted, shutter glasses disposed between a display to which the image signals are inputted and user's eyes are set to a light transmission state.
    Type: Grant
    Filed: January 22, 2008
    Date of Patent: September 30, 2014
    Assignee: Nec Corporation
    Inventors: Daigo Miyasaka, Masao Imai, Fujio Okumura
  • Patent number: 8818126
    Abstract: A block-based image denoising method includes determining similarities between a current block and reference blocks within a search range around the current block, from among certain-sized blocks divided from an input image; determining weights of the reference blocks with respect to the current block based on the similarities; and generating resultant blocks by denoising the current block with respect to every block of the input image based on the weights of the reference blocks.
    Type: Grant
    Filed: October 28, 2010
    Date of Patent: August 26, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Gun-shik Shin, Dong-hyun Kim, Jae-hun Lee, Sang-yun Kim
  • Patent number: 8818127
    Abstract: The picture quality of captured images can be improved with the degradation of clearness of image-captured object boundaries suppressed. An image processing apparatus (100) comprises: an image/distance acquiring unit (200) that acquires corresponding pixel pairs between left-eye and right-eye images, its depth information and its matching scores; a weight information calculating unit (300) that determines, for each of the pixel pairs, a weight of each of the pixels in a certain area including, as pixels of interest, the pixel pair on the basis of the depth information and the matching scores; and a pixel value superimposing unit (400) that applies, for each of the pixel pairs, the weight to the pixel values in the aforementioned certain area, thereby performing a smoothing process in at least one of the two images and that superimposes the two images using the values obtained by the smoothing process.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: August 26, 2014
    Assignee: Panasonic Intellectual Property Corporation of America
    Inventors: Keisuke Hayata, Hiroto Tomita, Tomoo Kimura
  • Patent number: 8811767
    Abstract: Depth values in a scene are measured by projecting sets of patterns on the scene, wherein each set of patterns is structured with different spatial frequency using different encoding functions. Sets of images of the scene is acquired, wherein there is one image for each pattern in each set. Depth values are determining for each pixel at corresponding locations in the sets of images. The depth values of each pixel are analyzed, and the depth value is returned if the depth values at the corresponding locations are similar. Otherwise, the depth value is marked as having an error.
    Type: Grant
    Filed: March 15, 2011
    Date of Patent: August 19, 2014
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Ashok Veeraraghavan, Mohit Gupta, Amit Agrawal
  • Patent number: 8798391
    Abstract: A method preprocessing scheme that improves classification accuracy of a face recognition system comprises identifying a plurality of edges of an image. The method further comprises step of identifying a plurality of discontinuities in the plurality of edges of the image. Furthermore, the method also comprises generating contiguous outline for the image. The last step of the method comprises filling a background of the image with at least one color.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: August 5, 2014
    Assignee: Infosys Limited
    Inventors: Ravindra Babu Tallamraju, Subrahmanya Sreenivasan Venkateshaiah, Chethan Shikaripur Annajirao Danivas, Mahalakshmi Kalmanje, Pavitra Chandrappa
  • Patent number: 8787696
    Abstract: In one embodiment the present invention includes a digital image processing method for concealing errors. The method includes determining error pixel locations based on motion vectors and determining if the error pixel locations in a current frame are on an edge of an object in the current frame. If an error pixel location is on an edge, then a search of pixel values is performed in the current frame along the edge for a replacement pixel value. If the error pixel location is not on an edge, then a search of pixel values is performed in a region adjacent to the edge for the replacement pixel value.
    Type: Grant
    Filed: July 26, 2013
    Date of Patent: July 22, 2014
    Assignee: Marvell International Ltd.
    Inventors: Mainak Biswas, Vipin Namboodiri
  • Patent number: 8767262
    Abstract: In an image processing device, the processor performs: (a) setting, as target pixel data, each set of pixel data; (b) selecting, from among the plurality of sets of pixel data, a plurality of first sets of pixel data corresponding to a plurality of first pixels positioned within a prescribed range of the image; (c) determining whether the plurality of first sets of pixel data represents a white background; (d) determining whether a variation in color difference components among the plurality of first sets of pixel data satisfies a prescribed condition; and (e) determining that target pixel data includes mosquito noise when the plurality of first sets of pixel data represents the white background and when the variation in the color difference component among the plurality of first sets of pixel data satisfies the prescribed condition. The prescribed range includes a pixel corresponding to the target pixel data.
    Type: Grant
    Filed: November 29, 2012
    Date of Patent: July 1, 2014
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Toshihiro Watanabe
  • Patent number: 8761538
    Abstract: In a deblocking operation, pixel values within a first block of pixels are compared, and pixel values in the first block are also compared to pixel values in a second block of pixels that is adjacent to the first block. Based on the results of the comparisons, a digital deblocking filter and a region of interest can be selected, where the region of interest identifies a number of pixels in the first block and a number of pixels in the second block to which the selected filter is to be applied.
    Type: Grant
    Filed: December 10, 2008
    Date of Patent: June 24, 2014
    Assignee: NVIDIA Corporation
    Inventors: Rochelle Pereira, Santanu Dutta
  • Patent number: 8744204
    Abstract: A method for detecting a block raster in an image comprising a number of pixels, each of which having assigned at least one pixel value, said pixels being arranged one after the other along horizontal and vertical pixel boundaries. The method includes establishing a first raster with raster limits (xj+dxj) that run either parallel to the vertical pixel boundaries or to the horizontal pixel boundaries and, the position of said limits being predetermined by way of an offset (OF) and an opposite distance (SP). A raster scale is determined of the raster as a function of the edge scales of at least some of the raster limits (xj,+dxj). The method is repeated for a second raster, and the first or second raster is selected in consideration of the raster scales.
    Type: Grant
    Filed: September 21, 2009
    Date of Patent: June 3, 2014
    Assignee: Entropic Communications, Inc.
    Inventor: Ulrich Niedermeier
  • Patent number: RE45152
    Abstract: A data processing apparatus capable of performing processing in units of block data by using processing results of other block data in a short time is provided, wherein a deblocking filter performs horizontal filtering processing and vertical filtering processing on first block data and second block data obtained by dividing restructured picture data into two in parallel by adjusting their dependency relation.
    Type: Grant
    Filed: May 10, 2012
    Date of Patent: September 23, 2014
    Assignee: Sony Corporation
    Inventor: Hiroshi Kajihata