Patents by Inventor Jae-Kyun Ahn
Jae-Kyun Ahn 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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Patent number: 11949881Abstract: The present invention discloses an encoding apparatus using a Discrete Cosine Transform (DCT) scanning, which includes a mode selection means for selecting an optimal mode for intra prediction; an intra prediction means for performing intra prediction onto video inputted based on the mode selected in the mode selection means; a DCT and quantization means for performing DCT and quantization onto residual coefficients of a block outputted from the intra prediction means; and an entropy encoding means for performing entropy encoding onto DCT coefficients acquired from the DCT and quantization by using a scanning mode decided based on pixel similarity of the residual coefficients.Type: GrantFiled: April 1, 2021Date of Patent: April 2, 2024Assignees: Electronics and Telecommunications Research Institute, Kwangwoon University Research Institute for Industry Cooperation, Industry-Academia Cooperation Group of Sejong UniversityInventors: Se-Yoon Jeong, Hae-Chul Choi, Jeong-Il Seo, Seung-Kwon Beack, In-Seon Jang, Jae-Gon Kim, Kyung-Ae Moon, Dae-Young Jang, Jin-Woo Hong, Jin-Woong Kim, Yung-Lyul Lee, Dong-Gyu Sim, Seoung-Jun Oh, Chang-Beom Ahn, Dae-Yeon Kim, Dong-Kyun Kim
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Publication number: 20240090328Abstract: The present invention relates to a multi-component host material and an organic electroluminescent device comprising the same. By comprising a specific combination of the multi-component host compounds, the organic electroluminescent device according to the present invention can provide high luminous efficiency and excellent lifespan characteristics.Type: ApplicationFiled: October 26, 2023Publication date: March 14, 2024Inventors: Hee-Choon AHN, Young-Kwang KIM, Su-Hyun LEE, Ji-Song JUN, Seon-Woo LEE, Chi-Sik KIM, Kyoung-Jin PARK, Nam-Kyun KIM, Kyung-Hoon CHOI, Jae-Hoon SHIM, Young-Jun CHO, Kyung-Joo LEE
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Patent number: 9749609Abstract: Disclosed is a method and apparatus for encoding a three-dimensional (3D) mesh. The method for encoding the 3D mesh includes determining a priority of a gate configuring a 3D mesh corresponding to a 3D object, removing vertices configuring the 3D mesh using the determined priority of the gate, and simplifying the 3D mesh.Type: GrantFiled: February 17, 2012Date of Patent: August 29, 2017Assignees: Samsung Electronics Co., Ltd., Korea University Industrial & Academic CollarbortionInventors: Min Su Ahn, Chang Su Kim, Tae Hyun Rhee, Do Kyoon Kim, Dae Youn Lee, Jae Kyun Ahn
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Patent number: 9424663Abstract: Disclosed is a three-dimensional (3D) mesh compression apparatus and method. The 3D mesh compression apparatus may generate a base mesh through a mesh simplification, may separately compress the base mesh and vertices eliminated by the simplification, and may compress 3D mesh data based on the covariance matrix.Type: GrantFiled: June 20, 2014Date of Patent: August 23, 2016Assignees: Samsung Electronics Co., Ltd., Korea University Industrial & Academic Collaboration FoundationInventors: Min Su Ahn, Jeong Hwan Ahn, Jae Kyun Ahn, Dae Youn Lee, Chang Su Kim
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Patent number: 9171383Abstract: A scalable three-dimensional (3D) mesh encoding method includes dividing the 3D mesh into layers of complexity into a plurality of graduated levels and generating vertex position information and connectivity information of each of the plurality of levels. The vertex position information about the 3D mesh is encoded based on a weighting in each bit plane and vertex position information having a higher weighting in each bit plane is first encoded.Type: GrantFiled: June 14, 2011Date of Patent: October 27, 2015Assignees: Samsung Electronics Co., Ltd., Korea University Industrial & Academic Collaboration FoundationInventors: Min Su Ahn, Chang Su Kim, Jae Kyun Ahn, Do Kyoon Kim, Dae Youn Lee
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Publication number: 20140300598Abstract: Disclosed is a three-dimensional (3D) mesh compression apparatus and method. The 3D mesh compression apparatus may generate a base mesh through a mesh simplification, may separately compress the base mesh and vertices eliminated by the simplification, and may compress 3D mesh data based on the covariance matrix.Type: ApplicationFiled: June 20, 2014Publication date: October 9, 2014Inventors: Min Su AHN, Jeong Hwan AHN, Jae Kyun AHN, Dae Youn LEE, Chang Su KIM
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Patent number: 8805097Abstract: Disclosed is a three-dimensional (3D) mesh compression apparatus and method. The 3D mesh compression apparatus may generate a base mesh through a mesh simplification, may separately compress the base mesh and vertices eliminated by the simplification, may construct a covariance matrix based on a topological distance between the eliminated vertices, and may compress 3D mesh data based on the covariance matrix.Type: GrantFiled: October 15, 2010Date of Patent: August 12, 2014Assignees: Samsung Electronics Co., Ltd., Korea University Industrial & Academic Collaboration FoundationInventors: Min Su Ahn, Jeong Hwan Han, Jae Kyun Ahn, Dae Youn Lee, Chang Su Kim
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Publication number: 20140168360Abstract: Disclosed is a method and apparatus for encoding a three-dimensional (3D) mesh. The method for encoding the 3D mesh includes determining a priority of a gate configuring a 3D mesh corresponding to a 3D object, removing vertices configuring the 3D mesh using the determined priority of the gate, and simplifying the 3D mesh.Type: ApplicationFiled: February 17, 2012Publication date: June 19, 2014Applicants: KOREA UNIVERSITY INDUSTRIAL & ACADEMIC COLLABORATION, SAMSUNG ELECTRONICS CO., LTD.Inventors: Min Su Ahn, Chang Su Kim, Tae Hyun Rhee, Do Kyoon Kim, Dae Youn Lee, Jae Kyun Ahn
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Patent number: 8660376Abstract: 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.Type: GrantFiled: January 19, 2012Date of Patent: February 25, 2014Assignees: Samsung Electronics Co., Ltd., Korea University Industrial & Academic Collaboration FoundationInventors: Min Su Ahn, Do Kyoon Kim, Tae Hyun Rhee, Chang Su Kim, Jae Kyun Ahn, Dae Youn Lee
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Patent number: 8437393Abstract: A method for estimating a boundary between a background and a user object in a video, in which the user object is segmented from the background is provided. The initial object contour is estimated in a first video frame for object segmentation, and color probability density functions are estimated for the user object and the background segmented from the first video frame. An edge strip with a predetermined width is generated in a current frame based on an object contour of a previous frame, and a coherence probability density function of the edge strip is estimated. The user object is segmented in the current frame by energy minimization.Type: GrantFiled: February 2, 2009Date of Patent: May 7, 2013Assignees: Samsung Electronics Co., Ltd., Korea University Industrial Academic Collaboration FoundationInventors: Young-O Park, Kwan-Woong Song, Young-Hun Joo, Kwang-Pyo Choi, Yun-Je Oh, Chang-Su Kim, Jae-Kyun Ahn
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Patent number: 8300947Abstract: A method and apparatus for estimating the contour of a user object in a moving picture during video communications so that a personal background image is not provided during video communications. Information about center coordinates as well as a size of a face of the user object is extracted from a moving picture frame. Edges are extracted from the moving picture frame, and a boundary of a head of the user object is estimated using a semicircle. The boundaries of left and right shoulders and left and right arms of the user object are estimated using second-order function graphs that overlap a largest portion of the edges. An entire contour of the user object is estimated according to the boundaries of the head, the left and right shoulders, and the left and right arms of the user object.Type: GrantFiled: January 30, 2009Date of Patent: October 30, 2012Assignees: Samsung Electronics Co., Ltd., Korea University Industrial & Academic Collaboration FoundationInventors: Young-O Park, Kwan-Woong Song, Young-Hun Joo, Kwang-Pyo Choi, Yun-Je Oh, Chang-Su Kim, Jae-Kyun Ahn
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Publication number: 20120189220Abstract: 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.Type: ApplicationFiled: January 19, 2012Publication date: July 26, 2012Applicants: Korea University Industrial & Academic Collaboration Foundation, Samsung Electronics Co., Ltd.Inventors: Min Su AHN, Do Kyoon Kim, Tae Hyun Rhee, Chang Su Kim, Jae Kyun Ahn, Dae Youn Lee
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Publication number: 20120013608Abstract: A scalable three-dimensional (3D) mesh encoding method includes dividing the 3D mesh into layers of complexity into a plurality of graduated levels and generating vertex position information and connectivity information of each of the plurality of levels. The vertex position information about the 3D mesh is encoded based on a weighting in each bit plane and vertex position information having a higher weighting in each bit plane is first encoded.Type: ApplicationFiled: June 14, 2011Publication date: January 19, 2012Applicants: KOREA UNIVERSITY INDUSTRIAL & ACADEMIC COLLABORATION FOUNDATION, SAMSUNG ELECTRONICS CO., LTD.Inventors: Min Su AHN, Chang Su Kim, Jae Kyun Ahn, Do Kyoon Kim, Dae Youn Lee
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Publication number: 20110091118Abstract: Disclosed is a three-dimensional (3D) mesh compression apparatus and method. The 3D mesh compression apparatus may generate a base mesh through a mesh simplification, may separately compress the base mesh and peaks eliminated by the simplification, may construct a covariance matrix based on a topological distance between the eliminated peaks, and may compress 3D mesh data based on the covariance matrix.Type: ApplicationFiled: October 15, 2010Publication date: April 21, 2011Applicants: Samsung Electronics Co., Ltd., Korea University Industrial & Academic Collaboration FoundationInventors: Min Su AHN, Jeong Hwan Ahn, Jae Kyun Ahn, Dae Youn Lee, Chang Su Kim
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Publication number: 20090196507Abstract: A method and apparatus for estimating the contour of a user object in a moving picture during video communications so that a personal background image is not provided during video communications. Information about center coordinates as well as a size of a face of the user object is extracted from a moving picture frame. Edges are extracted from the moving picture frame, and a boundary of a head of the user object is estimated using a semicircle. The boundaries of left and right shoulders and left and right arms of the user object are estimated using second-order function graphs that overlap a largest portion of the edges. An entire contour of the user object is estimated according to the boundaries of the head, the left and right shoulders, and the left and right arms of the user object.Type: ApplicationFiled: January 30, 2009Publication date: August 6, 2009Inventors: Young-O Park, Kwan-Woong Song, Young-Hun Joo, Kwang-Pyo Choi, Yun-Je Oh, Chang-Su Kim, Jae-Kyun Ahn
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Publication number: 20090196349Abstract: A method for estimating a boundary between a background and a user object in a video, in which the user object is segmented from the background is provided. The initial object contour is estimated in a first video frame for object segmentation, and color probability density functions are estimated for the user object and the background segmented from the first video frame. An edge strip with a predetermined width is generated in a current frame based on an object contour of a previous frame, and a coherence probability density function of the edge strip is estimated. The user object is segmented in the current frame by energy minimization.Type: ApplicationFiled: February 2, 2009Publication date: August 6, 2009Inventors: Young-O PARK, Kwan-Woong SONG, Young-Hun JOO, Kwang-Pyo CHOI, Yun-Je OH, Chang-Su KIM, Jae-Kyun AHN