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公开(公告)号：US11423581B2
公开(公告)日：2022-08-23
申请号：US17154406
申请日：2021-01-21
Inventor： Chi Wang , Pongsak Lasang , Chung Dean Han , Noritaka Iguchi , Toshiyasu Sugio
IPC: G06T9/00
Abstract: A three-dimensional data encoding method includes: generating a bitmap for combined three-dimensional data that is a combination of pieces of three-dimensional data, the bitmap indicating which of the pieces of three-dimensional data a three-dimensional point belongs to, the three-dimensional point being a three-dimensional point of the combined three-dimensional data and included in a unit space; generating a conversion code using the bitmap; and generating encoded data including duplicated point information indicating a total number of three-dimensional points included in the unit space, and conversion code information indicating the conversion code. Each of values of the bitmap corresponds to a combination of the conversion code and the total number of the three-dimensional points included in the unit space.
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公开(公告)号：US11197027B2
公开(公告)日：2021-12-07
申请号：US17142794
申请日：2021-01-06
Inventor： Chung Dean Han , Pongsak Lasang , Chi Wang , Noritaka Iguchi , Toshiyasu Sugio
IPC: H04N19/597 , H04N19/70 , G06T9/00
Abstract: A three-dimensional data encoding method includes: generating a bitstream by encoding subspaces included in a current space in which three-dimensional points are included. The bitstream includes encoded data respectively corresponding to the subspaces. In the generating of the bitstream, a list of information about the subspaces is stored in first control information included in the bitstream. The subspaces are respectively associated with identifiers assigned to the subspaces, and the first control information is common to the encoded data. Each of the identifiers assigned to the subspaces respectively corresponding to the encoded data is stored in a header of a corresponding one of the encoded data.
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公开(公告)号：US12243275B2
公开(公告)日：2025-03-04
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：US12230003B2
公开(公告)日：2025-02-18
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
IPC: G06F18/25 , G06F18/214 , G06T7/60 , G06T9/00 , G06V10/764 , G06V10/774 , G06V10/80 , G06V20/56
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：US11856207B2
公开(公告)日：2023-12-26
申请号：US17105910
申请日：2020-11-27
Inventor： Pongsak Lasang , Zheng Wu , Chi Wang , Chung Dean Han , Toshiyasu Sugio
IPC: H04N19/17 , H04N19/159 , H04N19/184 , G01B11/00 , H04N19/593
CPC classification number: H04N19/17 , G01B11/002 , H04N19/159 , H04N19/184 , H04N19/593
Abstract: A three-dimensional data encoding method of encoding three-dimensional points obtained by a sensor includes: encoding local coordinate information indicating sets of local coordinates that are coordinates of the three-dimensional points and are dependent on a location of the sensor; and generating an encoded bitstream including the local coordinate information encoded and global coordinate information indicating global coordinates that are coordinates of a reference point or at least one of the three-dimensional points and are independent from the location of the sensor.
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Patent Agency Ranking
公开(公告)号：US11606551B2
公开(公告)日：2023-03-14
申请号：US17119451
申请日：2020-12-11
Inventor： Toshiyasu Sugio , Chi Wang , Pongsak Lasang , Chung Dean Han , Noritaka Iguchi
IPC: H04N19/103 , H04N19/184 , H04N19/44 , H04N19/597
Abstract: A three-dimensional data encoding method includes: encoding a first flag indicating whether a node having a parent node different from a parent node of a current node is to be referred to in encoding of the current node included in an n-ary tree structure of three-dimensional points included in three-dimensional data; selecting a coding table from N coding tables according to occupancy states of neighboring nodes of the current node, and performing arithmetic encoding on information of the current node using the coding table selected, when the first flag indicates that the node is to be referred to; and selecting a coding table from M coding tables according to the occupancy states of the neighboring nodes of the current node, and performing arithmetic encoding on information of the current node using the coding table selected, when the first flag indicates that the node is not to be referred to.
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公开(公告)号：US12249105B2
公开(公告)日：2025-03-11
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：US12200254B2
公开(公告)日：2025-01-14
申请号：US17333777
申请日：2021-05-28
Inventor： Toshiyasu Sugio , Noritaka Iguchi , Chung Dean Han , Chi Wang , Pongsak Lasang
IPC: G06T9/00 , G06F18/25 , G06T9/40 , G06V20/64 , H04N19/597
Abstract: A three-dimensional data encoding method includes: generating combined point cloud data by combining pieces of point cloud data; and generating a bitstream by encoding the combined point cloud data. The bitstream includes (i) first information indicating a maximum number of duplicated points that are included in each of the pieces of point cloud data and are three-dimensional points having same geometry information, and (ii) pieces of second information corresponding one-to-one with point indexes and each indicating which of the pieces of point cloud data three-dimensional points having a corresponding one of the point indexes belong to, the point indexes being indexes to which values a total number of which is equal to the maximum number are assigned, and being used for identifying duplicated points belonging to same point cloud data.
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公开(公告)号：US12087023B2
公开(公告)日：2024-09-10
申请号：US17496230
申请日：2021-10-07
Inventor： Toshiyasu Sugio , Noritaka Iguchi , Pongsak Lasang , Chung Dean Han
IPC: G06T9/00 , G06F5/01 , H04N19/597 , H04N19/63
CPC classification number: G06T9/001 , G06F5/01 , G06T9/007 , H04N19/63 , H04N19/597
Abstract: A three-dimensional data encoding method includes: transforming pieces of attribute information of three-dimensional points included in point cloud data into coefficient values; and encoding the coefficient values to generate a bitstream. In the transforming, weighting calculation is performed hierarchically to generate the coefficient values belonging to one of layers, the weighting calculation separating each of the pieces of attribute information into a high-frequency component and a low-frequency component. In the weighting calculation, the weighting calculation is performed using weights fixed or not fixed in the layers. The bitstream includes first information indicating whether to fix the weights in the layers.
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公开(公告)号：US11989921B2
公开(公告)日：2024-05-21
申请号：US17091251
申请日：2020-11-06
Inventor： Chung Dean Han , Pongsak Lasang , Chi Wang , Toshiyasu Sugio
Abstract: A three-dimensional data encoding method includes generating a bitstream by encoding subspaces included in a current space including three-dimensional points. In the generating of the bitstream: first information is stored in a first header which is common to the subspaces and included in the bitstream, the first information indicating first coordinates which are coordinates of the current space; and second information is stored in a second header which is provided on a subspace basis and included in the bitstream, the second information indicating a difference between second coordinates which are coordinates of a corresponding subspace among the subspaces and the first coordinates.
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