Patents by Inventor Changick Kim
Changick Kim has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20220301190Abstract: A scene flow estimation method and apparatus are provided. The scene flow estimation method includes receiving a first feature pyramid and a second feature pyramid by encoding a first frame and a second frame of an input image through the same encoder, extracting a depth feature based on the first feature pyramid, extracting a motion feature based on the first feature pyramid and the second feature pyramid, generating an overall feature based on the depth feature and the motion feature, and estimating a scene flow based on the overall feature.Type: ApplicationFiled: February 10, 2022Publication date: September 22, 2022Applicants: SAMSUNG ELECTRONICS CO., LTD., Korea Advanced Institute of Science and TechnologyInventors: Youngjun KWAK, Taekyung KIM, Changick KIM, Byeongjun PARK, Changbeom PARK
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Patent number: 9414025Abstract: Disclosed is a method for intelligently displaying a sports game video for a multimedia mobile terminal, the method including the steps of: determining if a camera shot existing in the sports game video is a long-shot; when the camera shot is determined as a long-shot, determining a ROI within an image frame of the sports game video; and when the camera shot is determined as a non-long-shot, displaying the image frame on the mobile terminal, and, when the camera shot is determined as a long-shot, enlarging and displaying the ROI on the mobile terminal.Type: GrantFiled: March 15, 2012Date of Patent: August 9, 2016Assignee: Korea Advanced Institute of Science and TechnologyInventors: Changick Kim, Keewon Seo, Yong-Man Ro, Min-Soo Hahn
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Patent number: 8565512Abstract: A method, medium, and system generating a depth map of a video image are provided. The depth map generating method extracts the ground of a video image other than an object from the video image, classifies the video image as a long shot image or a non-long shot image based on a distribution value of the extracted ground, calculates a depth value gradually varied along a predetermined direction of the extracted ground when the video image corresponds to the long shot image and calculates a depth value based on the object when the video image corresponds to the non-long shot image. Accordingly, a sense of space and perspective can be effectively given to even a long shot image in which the ground occupies a large part of the image and a stereoscopic image recognizable by a viewer can be generated even if rapid object change is made between scenes in a video image.Type: GrantFiled: May 29, 2008Date of Patent: October 22, 2013Assignees: Samsung Electronics Co., Ltd., Information and Communications UniversityInventors: Yong Ju Jung, Changick Kim, Dusik Park, Youngwoo Kim, Jaeseung Ko
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Publication number: 20120224748Abstract: Disclosed is a method for intelligently displaying a sports game video for a multimedia mobile terminal, the method including the steps of: determining if a camera shot existing in the sports game video is a long-shot; when the camera shot is determined as a long-shot, determining a ROI within an image frame of the sports game video; and when the camera shot is determined as a non-long-shot, displaying the image frame on the mobile terminal, and, when the camera shot is determined as a long-shot, enlarging and displaying the ROI on the mobile terminal.Type: ApplicationFiled: March 15, 2012Publication date: September 6, 2012Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE & TECHNOLOGYInventors: Changick KIM, Keewon SEO, Yong-Man RO, Min-Soo HAHN
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Patent number: 8170102Abstract: An inter mode for encoding a video macroblock is selected. An initial analysis on the macroblock homogeneity is performed to quickly reduce the number of inter modes for which motion estimation and rate distortion calculation are to be performed. An inter mode is selected based on these calculations and sub-pixel motion estimation, at various sub-pixel interpolation granularities, is performed only on the selected inter mode. Sub-pixel motion estimation may be skipped for macroblocks that exhibit relatively low distortion at the integer pixel level.Type: GrantFiled: December 19, 2005Date of Patent: May 1, 2012Assignee: Seiko Epson CorporationInventors: Vasudev Bhaskaran, Norihisa Hagiwara, William Chen, Changick Kim
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Patent number: 8164630Abstract: Disclosed is a method for intelligently displaying a sports game video for a multimedia mobile terminal, the method including the steps of: determining if a camera shot existing in the sports game video is a long-shot; when the camera shot is determined as a long-shot, determining a ROI within an image frame of the sports game video; and when the camera shot is determined as a non-long-shot, displaying the image frame on the mobile terminal, and, when the camera shot is determined as a long-shot, enlarging and displaying the ROI on the mobile terminal.Type: GrantFiled: September 27, 2006Date of Patent: April 24, 2012Assignee: Korea Advanced Institute of Science and Technology (K.A.I.S.T.)Inventors: Changick Kim, Keewon Seo, Yong-Man Ro, Min-Soo Hahn
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Patent number: 7944965Abstract: Transform based distortion cost estimation, which may be used to calculate a rate distortion cost associated with a mode for encoding a macroblock, is described. In one embodiment of the invention, a distortion value for a particular mode is estimated within the transform domain, which allows for the elimination of both inverse transformation and inverse motion functions in this calculation. A spatial domain residual of an encoding mode is estimated by identifying a difference, within the transform domain, between a motion compensated prediction residual of a macroblock and its corresponding reconstructed signal. The estimated spatial domain residual may then be used in distortion matrix computations to estimate a distortion level, within the transform domain, for an encoding mode.Type: GrantFiled: December 19, 2005Date of Patent: May 17, 2011Assignee: Seiko Epson CorporationInventors: Vasudev Bhaskaran, William Chen, Changick Kim
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Patent number: 7830961Abstract: An inter-mode for encoding a video macroblock is selected based on a comparison of at least two rate-distortion values associated with inter-modes. The number of potential inter-modes for encoding the video macroblock is initially reduced based on the rate-distortion calculation of the SKIP mode between the current macroblock and the collocated macroblock (corresponding to a 0,0 motion vector). Motion estimation is performed on the remaining inter-modes to identify reference blocks and motion vectors. The number of calculations performed in identifying the reference blocks and motion vectors is potentially reduced because associations between inter-modes are recognized and leveraged.Type: GrantFiled: June 21, 2005Date of Patent: November 9, 2010Assignee: Seiko Epson CorporationInventors: Changick Kim, William Chen, Vasudev Bhaskaran
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Patent number: 7751478Abstract: A prediction mode for encoding data is selected using a reduced number of rate-distortion cost computations. This reduction in rate-distortion cost computations is caused by filtering the number of potential intra prediction modes based on two criteria. First, the number of potential prediction modes is reduced based on at least one characteristic of a quantization procedure performed during the encoding procedure. Second, the number of potential prediction modes is reduced based on an error value calculated for each of the potential prediction modes.Type: GrantFiled: January 21, 2005Date of Patent: July 6, 2010Assignee: Seiko Epson CorporationInventors: Changick Kim, William Chen, Vasudev Bhaskaran
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Patent number: 7623577Abstract: A method for smoothing artificial discontinuities between image blocks associated with digital data comprises reconstructing a block-based pixel representation of image blocks associated with digital data. If the difference between adjacent image blocks of the block-based pixel representation is less than or equal to a quantization parameter, then the method includes modifying boundary pixel values to define at least one additional frame, and displaying the at least one additional frame and an original frame in an alternating fashion so as to visually achieve smooth block boundaries between the adjacent image blocks. The method may be performed by a suitable device and/or may be embodied in an instruction set executable by such device.Type: GrantFiled: January 31, 2006Date of Patent: November 24, 2009Inventors: Changick Kim, Joseph Shu
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Publication number: 20090196492Abstract: A method, medium, and system generating a depth map of a video image are provided. The depth map generating method extracts the ground of a video image other than an object from the video image, classifies the video image as a long shot image or a non-long shot image based on a distribution value of the extracted ground, calculates a depth value gradually varied along a predetermined direction of the extracted ground when the video image corresponds to the long shot image and calculates a depth value based on the object when the video image corresponds to the non-long shot image. Accordingly, a sense of space and perspective can be effectively given to even a long shot image in which the ground occupies a large part of the image and a stereoscopic image recognizable by a viewer can be generated even if rapid object change is made between scenes in a video image.Type: ApplicationFiled: May 29, 2008Publication date: August 6, 2009Applicants: SAMSUNG ELECTRONICS CO., LTD., INFORMATION AND COMMUNICATIONS UNIVERSITYInventors: Yong Ju Jung, Changick Kim, Dusik Park, Youngwoo Kim, Jaeseung Ko
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Patent number: 7532804Abstract: A method for a matching technique for detecting copies of a video clip is provided. The method includes comparing temporal trails of intensity distributions between frames of the video clip and frames of a target video. A computer readable media, a computer system and integrated circuit for video copy detection are also provided.Type: GrantFiled: February 13, 2004Date of Patent: May 12, 2009Assignee: Seiko Epson CorporationInventor: Changick Kim
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Patent number: 7486827Abstract: A two-step matching technique is embodied in a video-copy-detection algorithm that detects copies of video sequences. The two-step matching technique uses ordinal signatures of frame partitions and their differences from partition mean values. The algorithm of this invention is not only robust to intensity/color variations it can also effectively handle various format conversions, thereby providing robustness regardless of the video dynamics of the frame shots.Type: GrantFiled: January 21, 2005Date of Patent: February 3, 2009Assignee: Seiko Epson CorporationInventor: Changick Kim
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Patent number: 7460278Abstract: A 3-D dot code is embedded in a printed medium using an embedder that embeds data directly into the halftone dots of a selected file that is ready for printing. An extractor extracts the embedded bits by scanning the printed medium and then interprets the embedded data. A bleed-through elimination module in the extractor is able to eliminate adverse affects on the scanned input of the embedded data caused by bleed-through from the print on the opposite side of the page. The extractor may also include a module that compensates for a misaligned scanned input by automatically detecting the rotation and translation, and then registering the image so that the upper-left corner is located in a certain position. This operation expedites subsequent data retrieval, in which data is read by block matching.Type: GrantFiled: September 1, 2004Date of Patent: December 2, 2008Assignee: Seiko Epson CorporationInventors: Changick Kim, Vasudev Bhaskaran, Joseph Shu
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Patent number: 7302096Abstract: A method for extracting an object of interest from an image is provided. The method initiates with defining an image feature space based upon frequency information. Then, the image feature space is filtered to smooth both focused regions and defocused regions while maintaining respective boundaries associated with the focused regions and the defocused regions. The filtered image feature space is manipulated by region merging and adaptive thresholding to extract an object-of-interest. A computer readable media, an image capture device and an image searching system are also provided.Type: GrantFiled: April 11, 2003Date of Patent: November 27, 2007Assignee: Seiko Epson CorporationInventor: Changick Kim
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Publication number: 20070242088Abstract: Disclosed is a method for intelligently displaying a sports game video for a multimedia mobile terminal, the method including the steps of: determining if a camera shot existing in the sports game video is a long-shot; when the camera shot is determined as a long-shot, determining a ROI within an image frame of the sports game video; and when the camera shot is determined as a non-long-shot, displaying the image frame on the mobile terminal, and, when the camera shot is determined as a long-shot, enlarging and displaying the ROI on the mobile terminal.Type: ApplicationFiled: September 27, 2006Publication date: October 18, 2007Inventors: Changick Kim, Keewon Seo, Yong-Man Ro, Min-Soo Hahn
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Publication number: 20070140338Abstract: An inter mode for encoding a video macroblock is selected. An initial analysis on the macroblock homogeneity is performed to quickly reduce the number of inter modes for which motion estimation and rate distortion calculation are to be performed. An inter mode is selected based on these calculations and sub-pixel motion estimation, at various sub-pixel interpolation granularities, is performed only on the selected inter mode. Sub-pixel motion estimation may be skipped for macroblocks that exhibit relatively low distortion at the integer pixel level.Type: ApplicationFiled: December 19, 2005Publication date: June 21, 2007Inventors: Vasudev Bhaskaran, Norihisa Hagiwara, William Chen, Changick Kim
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Publication number: 20070140339Abstract: Transform based distortion cost estimation, which may be used to calculate a rate distortion cost associated with a mode for encoding a macroblock, is described. In one embodiment of the invention, a distortion value for a particular mode is estimated within the transform domain, which allows for the elimination of both inverse transformation and inverse motion functions in this calculation. A spatial domain residual of an encoding mode is estimated by identifying a difference, within the transform domain, between a motion compensated prediction residual of a macroblock and its corresponding reconstructed signal. The estimated spatial domain residual may then be used in distortion matrix computations to estimate a distortion level, within the transform domain, for an encoding mode.Type: ApplicationFiled: December 19, 2005Publication date: June 21, 2007Inventors: Vasudev Bhaskaran, William Chen, Changick Kim
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Patent number: 7212571Abstract: A method for encoding video data to reduce blocking artifacts is provided. The method initiates with identifying a macro-block as being associated with a blocking artifact. For example the macro-block may be identified as a low activity macro-block or a high activity macro-block. Then, blocking artifacts introduced through a compression operation are mitigated by adjusting both a quantization parameter and an amount of bits generated from the quantization parameter. A video encoder and a system for processing image data associated with block based compression are provided.Type: GrantFiled: January 31, 2003Date of Patent: May 1, 2007Assignee: Seiko Epson CorporationInventors: Vasudev Bhaskaran, Changick Kim
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Patent number: 7167574Abstract: A method for detecting a copy of a digital image initiates with dividing a suspected copy of a digital image into sub-images. Then, the average intensities associated with each of the sub-images is determined. Next, the average intensities are transformed into a series of coefficients. Then, a rank matrix from the series of coefficients is defined. Next, the rank matrix from the series of coefficients is compared to a rank matrix of a query image to determine if the suspected copy is an actual copy of the digital image. A computer readable media, a computer system and computer code configured to be executed on a computer system are also provided.Type: GrantFiled: October 1, 2002Date of Patent: January 23, 2007Assignee: Seiko Epson CorporationInventor: Changick Kim