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    METHOD AND APPARATUS OF ENCODING/DECODING POINT CLOUD GEOMETRY DATA SENSED BY AT LEAST ONE SENSOR
    1.
    发明公开
    METHOD AND APPARATUS OF ENCODING/DECODING POINT CLOUD GEOMETRY DATA SENSED BY AT LEAST ONE SENSOR 审中-公开

    公开(公告)号：US20240362824A1

    公开(公告)日：2024-10-31

    申请号：US18687773

    申请日：2022-06-17

    申请人： BEIJING XIAOMI MOBILE SOFTWARE CO., LTD.

    发明人： Sebastien LASSERRE ,  Jonathan TAQUET

    IPC分类号： G06T9/00

    CPC分类号： G06T9/001

    摘要： The method of encoding/decoding a point cloud sensed by any type of sensor following a sensing path obtains coarse representations of sensed points and encodes the sensing path and the coarse representations. The sensing path and coarse representations of points are decoded, and points of the point cloud are reconstructed from the decoded sensing path and the decoded coarse representations. The coarse representations of sensed points of the point cloud are coarse points defined in a two-dimensional angular coordinate space, and a coarse point is obtained by shifting a sensing point in the two-dimensional angular coordinate space with shifting values that depend on the sensor index associated with the sensor that sensed the point P of the point cloud.

    Decoding of patch temporal alignment for mesh compression
    4.
    发明授权
    Decoding of patch temporal alignment for mesh compression 有权

    公开(公告)号：US12125250B2

    公开(公告)日：2024-10-22

    申请号：US17954961

    申请日：2022-09-28

    申请人： Tencent America LLC

    发明人： Jun Tian ,  Xiang Zhang ,  Xiaozhong Xu ,  Chao Huang ,  Shan Liu

    IPC分类号： G06T9/00 ,  G06T15/04 ,  G06T17/20

    CPC分类号： G06T9/001 ,  G06T15/04 ,  G06T17/20

    摘要： Processing circuitry decodes a texture map in 2D from a bitstream carrying a 3D mesh frame. The 3D mesh frame represents a surface of an object with polygons and is partitioned into patches. The texture map includes transformed patches with transformed UV coordinates that are transformed from original UV coordinates of the patches according to remap transform parameters. The processing circuitry decodes the remap transform parameters associated with the patches and generates a recovered texture map from the texture map according to the remap transform parameters. At least a first recovered pixel in the recovered texture map is assigned with a texture value at a first transformed position in the texture map, the first transformed position in the texture map is determined according to a pixel position of the first recovered pixel and first remap transform parameters associated with a first patch that the first recovered pixel belongs to.

    INFORMATION PROCESSING APPARATUS AND METHOD
    6.
    发明公开
    INFORMATION PROCESSING APPARATUS AND METHOD 审中-公开

    公开(公告)号：US20240346704A1

    公开(公告)日：2024-10-17

    申请号：US18683053

    申请日：2022-03-01

    申请人： Sony Group Corporation

    发明人： Tomoya NAGANUMA ,  Satoru KUMA ,  Hiroyuki YASUDA ,  Ohji NAKAGAMI

    IPC分类号： G06T9/00

    CPC分类号： G06T9/001

    摘要： There is provided an information processing apparatus and method to make it possible to reduce a decrease in encoding efficiency. A predictive residual that is a difference between a reflected light intensity that is attribute data of a point cloud representing an object having a three-dimensional shape as a set of points and a predicted value of the reflected light intensity generated by using a reflection model of light on a surface of the object is generated by decoding encoded data of the predictive residual, a coefficient of the reflection model is derived, a predicted value is derived by performing prediction processing by using the reflection model and the coefficient, and the reflected light intensity is generated by adding the predictive residual obtained by decoding the encoded data and the derived predicted value. The present disclosure can be applied to, for example, an information processing apparatus, an electronic device, an image processing method, a program or the like.

    METHOD AND APPARATUS TO ENCODE MESH BASED ON SYMMETRY PROPERTY
    7.
    发明公开
    METHOD AND APPARATUS TO ENCODE MESH BASED ON SYMMETRY PROPERTY 审中-公开

    公开(公告)号：US20240346703A1

    公开(公告)日：2024-10-17

    申请号：US18634367

    申请日：2024-04-12

    申请人： Tencent America LLC

    发明人： Thuong NGUYEN CANH ,  Xiaozhong XU ,  Chao HUANG ,  Shan LIU

    IPC分类号： G06T9/00 ,  G06T7/40 ,  G06T7/68

    CPC分类号： G06T9/001 ,  G06T7/40 ,  G06T7/68

    摘要： A method includes determining a symmetry plane that the divides a mesh into a first side and a second side opposite the first side; performing, on the first side of the mesh, a decimation process to generate a decimated first side of the mesh; performing UV reparameterization on the decimated first side of the mesh to generate a first side UV reparameterized mesh; performing texture transfer on the first side UV reparameterized mesh to generate a first side texture image; determining whether the first side texture image exhibits a degree of texture symmetry with the second side of the mesh that satisfies a condition; and based on a determination that the condition is not satisfied, performing a symmetry texture transfer process between a first texture coordinate on the first side and a second texture coordinate on the second side.

    SPHERICAL SHEARLET-BASED COMPRESSION AND RECONSTRUCTION METHOD FOR THREE-DIMENSIONAL SCALAR INFORMATION
    8.
    发明公开
    SPHERICAL SHEARLET-BASED COMPRESSION AND RECONSTRUCTION METHOD FOR THREE-DIMENSIONAL SCALAR INFORMATION 审中-公开

    公开(公告)号：US20240338858A1

    公开(公告)日：2024-10-10

    申请号：US18617608

    申请日：2024-03-26

    申请人： ZHEJIANG UNIVERSITY

    发明人： Yizhi SUN

    IPC分类号： G06T9/00

    CPC分类号： G06T9/001

    摘要： A spherical shearlet-based compression and reconstruction method for three-dimensional scalar information is disclosed. The method is used for processing data distributed in accordance to certain probability distribution in a three-dimensional space, and is especially suitable for processing random or deterministic scalar data having a spherical distribution feature under polar coordinates and being anisotropic on a sphere, including spatial data with physical significance and clinical observation data in biomedicine. In the present disclosure, on the basis of reasonably dividing the three-dimensional space into multiple concentric spherical layers, the three-dimensional data distribution is decomposed into multiple layers of spherical data. In each layer related spherical information is decomposed, and key information is extracted, compressed and stored by using the mathematical property of a spherical shearlet system, and the original three-dimensional data information can be reconstructed or approximately restored from extracted key data.

    METHOD FOR ENCODING AND DECODING A POINT CLOUD
    9.
    发明公开
    METHOD FOR ENCODING AND DECODING A POINT CLOUD 审中-公开

    公开(公告)号：US20240312064A1

    公开(公告)日：2024-09-19

    申请号：US18575548

    申请日：2021-07-02

    申请人： Beijing Xiaomi Mobile Software Co., Ltd. ,  Xidian University

    发明人： Wei ZHANG ,  Mary-Luc Georges Henry CHAMPEL ,  Shuo GAO

    IPC分类号： G06T9/00

    CPC分类号： G06T9/001

    摘要： A method for encoding, in a bitstream, point attributes associated to a point of a point cloud, includes: determining, for a point P to be encoded to the bitstream, a predictor list of k predictor points of the point cloud including k points of the point cloud nearest to the point P to be encoded, wherein the k points are selected according to their relative position to each other; and encoding the point attributes associated to the point P to be encoded by predictive encoding based on attributes of the predictor points of the predictor list.