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1.发明公开公开(公告)号：US20230394711A1
公开(公告)日：2023-12-07
申请号：US18236279
申请日：2023-08-21
Inventor： Wenjie ZHU
IPC: G06T9/00
CPC classification number: G06T9/00
Abstract: In a method for point cloud prediction processing, an alternative point set of a target point cloud group is obtained from M point cloud groups. The M point cloud groups include the target point cloud group. Coordinate code words of point cloud points in each of the M point cloud groups are identical after shifting by a grouping shift bit number corresponding to the respective point cloud group. Prediction reference points associated with a target point cloud point of the point cloud points in the target point cloud group are obtained from the alternative point set. The target point cloud point is predicted by processing circuitry based on the prediction reference points, to obtain a target predicted attribute value of the target point cloud point.
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2.发明申请
公开(公告)号：US20230086264A1
公开(公告)日：2023-03-23
申请号：US18051713
申请日：2022-11-01
Inventor： Wenjie ZHU
Abstract: In the field of computer vision, a decoding method, an encoding method, a decoder, and an encoder based on point cloud attribute prediction are provided. The decoding method includes: parsing a code stream of a point cloud to obtain reconstructed information of position information of a target point; selecting candidate points of the target point from decoded points in the point cloud; selecting neighbor points from the candidate points based on the reconstructed information of the position information of the target point; determining a predicted value of attribute information of the target point by using attribute values of the neighbor points; and obtaining a decoded point cloud based on the predicted value of the attribute information of the target point. Neighbor points with attributes similar to that of a target point are selected where possible to predict attribute information of the target point, thereby reducing the prediction complexity.
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公开(公告)号：US20240087176A1
公开(公告)日：2024-03-14
申请号：US18514586
申请日：2023-11-20
Inventor： Wenjie ZHU , Shan LIU
IPC: G06T9/40
CPC classification number: G06T9/40
Abstract: A point cloud decoding method is provided. In the method, a target point cloud group of a plurality of point cloud groups is obtained. The target point cloud group includes at least one point. An attribute coding mode of the target point cloud group is determined. Prediction attribute information of each point in the target point cloud group is obtained based on attribute prediction of the respective point in the target point cloud group according to the attribute coding mode of the target point cloud group. Reconstruction residual information of each point in the target point cloud group is obtained based on attribute decoding of the respective point in the target point cloud group. Reconstruction attribute information of each point in the target point cloud group is determined according to the prediction attribute information and the reconstruction residual information of the respective point in the target point cloud group.
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公开(公告)号：US20240087174A1
公开(公告)日：2024-03-14
申请号：US18512223
申请日：2023-11-17
Inventor： Wenjie ZHU
IPC: G06T9/00
CPC classification number: G06T9/001
Abstract: A point cloud including a plurality of points is acquired. Each of the plurality of points includes N pieces of attribute information. N is a positive integer greater than 1. A to-be-coded value is determined for each of the N pieces of attribute information of a current point of the plurality of points based on the N pieces of attribute information of a point prior to the current point being encoded. The to-be-coded values of the N pieces of attribute information of the current point are encoded based on at least one of a selected encoder or a selected coding mode to obtain a code stream of the point cloud. The to-be-coded value for each of the N pieces of attribute information of the current point is encoded based on a respective one of the one or more encoders and a respective one of the one or more coding modes.
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公开(公告)号：US20250063178A1
公开(公告)日：2025-02-20
申请号：US18937433
申请日：2024-11-05
Inventor： Wenjie ZHU
IPC: H04N19/157 , H04N19/597 , H04N19/60 , H04N19/70 , H04N19/91 , H04N19/96
Abstract: This disclosure relates to a point cloud processing method and apparatus. In the point cloud processing method, in a decoding phase, encoded data of a point cloud is obtained, the encoded data is analyzed to obtain shift data, the shift data being obtained by performing shift processing on target encoding information of the point cloud in an encoding process of the point cloud, and shift reconstruction is performed on the shift data to obtain reconstructed encoding information of the target encoding information. In the point cloud processing method, in an encoding phase, the target encoding information of the point cloud is obtained, shift processing is performed on the target encoding information to obtain the shift data of the target encoding information, and the shift data is encoded.
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公开(公告)号：US20230082456A1
公开(公告)日：2023-03-16
申请号：US17989523
申请日：2022-11-17
Inventor： Wenjie ZHU
IPC: G06T9/00 , H04N19/105 , H04N19/169
Abstract: A method includes: decoding a point cloud code stream to obtain decoded points in a point cloud; determining a target association relationship, the target association relationship including at least one association relationship of a preset association relationship between neighbor point parameters and a preset association relationship between a space parameter of the point cloud and the neighbor point parameters; obtaining the neighbor point parameters according to the target association relationship; selecting at least one neighbor point of a current point from the decoded points according to at least one of a quantity N of candidate points, a quantity K of neighbor points, and a preset distance d between the neighbor point and the current point in the neighbor point parameters; and determining a predicted value of attribute information of the current point according to attribute information of the at least one neighbor point of the current point.
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公开(公告)号：US20230055026A1
公开(公告)日：2023-02-23
申请号：US17980339
申请日：2022-11-03
Inventor： Wenjie ZHU
IPC: H04N19/597
Abstract: A point cloud data encoding method is provided, which includes: acquiring initial point cloud data in a point cloud data processing environment; determining a space grid structure corresponding to the initial point cloud data; determining a filling order of different point cloud points in the initial point cloud data in the space grid structure; determining, based on the filling order of different point cloud points in the initial point cloud data in the space grid structure, residual information matched with the initial point cloud data; and encoding, according to the residual information, the initial point cloud data to obtain target point cloud data. A point cloud data decoding method, a point cloud data processing method, apparatuses, an electronic device, a computer program product, and a computer-readable storage medium are also provided.
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公开(公告)号：US20250045972A1
公开(公告)日：2025-02-06
申请号：US18921685
申请日：2024-10-21
Inventor： Wenjie ZHU
Abstract: A point cloud processing method, performed by a decoding device, includes: obtaining coding data of a point cloud; determining a coding schemes of a first point to be decoded in the point cloud, in K directions, based on the coding data; and decoding the first point based on the determined plurality of coding schemes, wherein K is a positive integer.
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公开(公告)号：US20240080478A1
公开(公告)日：2024-03-07
申请号：US18502591
申请日：2023-11-06
Inventor： Wenjie ZHU , Shai Cohen , Dor OZ , Alon Gabbay , Idan Yokev
IPC: H04N19/597 , H04N19/18 , H04N19/91
CPC classification number: H04N19/597 , H04N19/18 , H04N19/91
Abstract: A point cloud encoding and decoding method including: obtaining encoding limit information that comprises a group quantity limit threshold; obtaining a transform coefficient sequence of point cloud points based on the encoding limit information, where the point cloud points are comprised in a point cloud group that has a quantity less than or equal to the group quantity limit threshold, and where the transform coefficient sequence is obtained by sorting transform coefficients of the point cloud points; and encoding the transform coefficient sequence to obtain a point cloud group bitstream that corresponds to the point cloud group.
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公开(公告)号：US20240037799A1
公开(公告)日：2024-02-01
申请号：US18369012
申请日：2023-09-15
Inventor： Wenjie ZHU
IPC: G06T9/00
CPC classification number: G06T9/001
Abstract: This application provides a point cloud decoding performed by an electronic device. The method includes: obtaining a current point to be decoded from a point cloud code stream, the current point comprising N types of attribute information, and N being an integer greater than 1; determining M attribute groups of the N types of attribute information of the current point, M being a positive integer less than N; and perform uniform decoding for each attribute information in a same attribute group of the current point using a first operation, the first operation comprising at least one of a neighbor point determination and an attribute predicted value calculation. According to this application, the point cloud decoding method avoids the repeated searching, reduces time complexity during attribute decoding and improves attribute decoding efficiency.
