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公开(公告)号：US20220058834A1
公开(公告)日：2022-02-24
申请号：US17521309
申请日：2021-11-08
Inventor： Noritaka IGUCHI , Toshiyasu SUGIO , Chung Dean HAN , Pongsak LASANG , Pradit MITTRAPIYANURUK , Keng Liang LOI
Abstract: A three-dimensional data encoding method includes: encoding, for each of three-dimensional points included in point cloud data, geometry information and one or more items of attribute information to generate a bitstream. In the encoding, a normal vector of each of the three-dimensional points is encoded as an item of attribute information included in the one or more items of attribute information of the three-dimensional point.
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公开(公告)号：US20250148650A1
公开(公告)日：2025-05-08
申请号：US19013329
申请日：2025-01-08
Inventor： Chung Dean HAN , Pongsak LASANG , Pradit MITTRAPIYANURUK , Keng Liang LOI , Noritaka IGUCHI , Toshiyasu SUGIO
Abstract: A three-dimensional data decoding method includes: obtaining three-dimensional space information including encoded three-dimensional points; calculating an angle formed by a line segment connecting a predetermined position in the three-dimensional space information and a first base point and a line segment connecting the first base point and a second base point different from the first base point; determining whether the angle calculated satisfies a predetermined condition; and decoding the encoded three-dimensional points included in the three-dimensional space information when the angle calculated is determined to satisfy the predetermined condition, and not decoding the encoded three-dimensional points included in the three-dimensional space information when the angle calculated is determined not to satisfy the predetermined condition.
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公开(公告)号：US20220303577A1
公开(公告)日：2022-09-22
申请号：US17734613
申请日：2022-05-02
Inventor： Toshiyasu SUGIO , Noritaka IGUCHI , Pongsak LASANG , Chung Dean HAN , Keng Liang LOI , Pradit MITTRAPIYANURUK
IPC: H04N19/597 , H04N19/167
Abstract: A three-dimensional data encoding method includes: generating a first predicted value for an item of position information of a first three-dimensional point included in point cloud data, using an item of position information of a reference three-dimensional point included in the point cloud data and angle information; calculating a first difference value between the item of position information of the first three-dimensional point and the first predicted value; and generating a bitstream including the first difference value and the angle information.
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Patent Agency Ranking
公开(公告)号：US20220222863A1
公开(公告)日：2022-07-14
申请号：US17709966
申请日：2022-03-31
Inventor： Chung Dean HAN , Pongsak LASANG , Pradit MITTRAPIYANURUK , Keng Liang LOI , Noritaka IGUCHI , Toshiyasu SUGIO
IPC: G06T9/00
Abstract: A three-dimensional data encoding method includes: determining a first maximum bit count for encoded data obtained after encoding at least one of (i) a divisional data unit obtained when point cloud data indicating a three-dimensional point cloud is divided or (ii) a point cloud data unit of the point cloud data before the dividing; and generating a bitstream by encoding (i) items of divisional data obtained by dividing the point cloud data or (ii) the point cloud data before the dividing, to satisfy the first maximum bit count determined. The bitstream includes first bit count information indicating the first maximum bit count.
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公开(公告)号：US20220222862A1
公开(公告)日：2022-07-14
申请号：US17709805
申请日：2022-03-31
Inventor： Chung Dean HAN , Pongsak LASANG , Pradit MITTRAPIYANURUK , Keng Liang LOI , Noritaka IGUCHI , Toshiyasu SUGIO
Abstract: A three-dimensional data decoding method includes: obtaining three-dimensional space information including encoded three-dimensional points; calculating an angle formed by a line segment connecting a predetermined position in the three-dimensional space information and a first base point and a line segment connecting the first base point and a second base point different from the first base point; determining whether the angle calculated satisfies a predetermined condition; and decoding the encoded three-dimensional points included in the three-dimensional space information when the angle calculated is determined to satisfy the predetermined condition, and not decoding the encoded three-dimensional points included in the three-dimensional space information when the angle calculated is determined not to satisfy the predetermined condition.
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公开(公告)号：US20220343556A1
公开(公告)日：2022-10-27
申请号：US17859582
申请日：2022-07-07
Inventor： Noritaka IGUCHI , Toshiyasu SUGIO , Pongsak LASANG , Chung Dean HAN , Keng Liang LOI , Pradit MITTRAPIYANURUK
Abstract: A three-dimensional data encoding method includes: determining whether to encode each of data units using both or one of an N-ary tree and a prediction tree, each of the data units including three-dimensional points, N being an integer greater than or equal to 2; and generating a bitstream by encoding position information items of the three-dimensional points included in each of the data units, using the both or one of the N-ary tree and the prediction tree determined.
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公开(公告)号：US20220198719A1
公开(公告)日：2022-06-23
申请号：US17690671
申请日：2022-03-09
Inventor： Chung Dean HAN , Pongsak LASANG , Pradit MITTRAPIYANURUK , Keng Liang LOI , Noritaka IGUCHI , Toshiyasu SUGIO
IPC: G06T9/40
Abstract: A three-dimensional data encoding method includes: encoding three-dimensional points each located in any one of a plurality of regions, on a per region basis, to generate encoded three-dimensional points; generating connectivity information generated based on a relationship between a first region among the plurality of regions and second regions aside from the first region among the plurality of regions, the connectivity information including (i) tile information indicating values each uniquely assigned to a different one of the plurality of regions and (ii) relation information indicating that the first region and one of the second regions are related; and generating a bitstream including the connectivity information generated and the encoded three-dimensional points.
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公开(公告)号：US20220108489A1
公开(公告)日：2022-04-07
申请号：US17553090
申请日：2021-12-16
Inventor： Toshiyasu SUGIO , Noritaka IGUCHI , Chung Dean HAN , Pongsak LASANG , Pradit MITTRAPIYANURUK , Keng Liang LOI
IPC: G06T9/00
Abstract: A three-dimensional data encoding method includes: calculating coefficient values from items of attribute information of three-dimensional points; quantizing the coefficient values to generate quantization values; and generating a bitstream including the quantization values. One or more items of attribute information are classified, for each of three-dimensional spaces, into one of groups, the three-dimensional spaces (i) being included in a plurality of three-dimensional spaces, and (ii) including, among the three-dimensional points, three-dimensional points including the one or more items of attribute information. In the quantizing, the coefficient values are quantized using a predetermined quantization parameter or one or more quantization parameters for one or more groups, the one or more groups being included in the groups and including one or more items of attribute information used to calculate the coefficient values, the one or more items of attribute information being included in the items of attribute information.
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