公开(公告)号：US20230062296A1

公开(公告)日：2023-03-02

申请号：US17046653

申请日：2019-04-09

Applicant: InterDigital VC Holdings, Inc.

Inventor： Julien RICARD ,  Celine GUEDE ,  Yannick OLIVIER ,  Joan LLACH PINSACH

IPC: G06T9/00

Abstract: At least one embodiment relates to a method comprising encoding a projection mode associated with an image region of a first depth image, said projection mode indicating if said image region stores either the minimum or the maximum depth value of at least one orthogonally projected 3D point of the point cloud along a same projection direction; and encoding said depth minimum and maximum depth values as a function of said projection mode.

公开(公告)号：US20200302653A1

公开(公告)日：2020-09-24

申请号：US16630435

申请日：2018-06-25

Applicant: INTERDIGITAL VC HOLDINGS, INC

Inventor： Sebastien LASSERRE ,  Julien RICARD ,  Celine GUEDE

IPC: G06T9/40 ,  G06T3/40 ,  G06T3/00 ,  H04N19/597 ,  H04N19/96

Abstract: The present principles relates to a two-steps approach for encoding and decoding the geometry of a point cloud. In a first step, an octree-based structure is obtained by splitting recursively a cube encompassing the point cloud until the leaf cubes associated with the leaf nodes of said octree-based structure reach down an expected size. In a second step, for each leaf cube associated with the leaf nodes of said octree-based structure (IO), the approach determines if a local octree-based structure is associated (or not) with a leaf cube by using a Rate-Distortion Optimisation process that optimizes a trade-off between a bit-rate for encoding a candidate octree-based structure approximating the geometry of points of the point cloud which are included in said leaf cube of the octree-based structure, and a distortion that takes into account spatial distances between, on one hand, said points of the point cloud, and on the other hand, points included in leaf cubes associated with leaf nodes of the candidate octree-based structure.

公开(公告)号：US20240073453A1

公开(公告)日：2024-02-29

申请号：US18383489

申请日：2023-10-25

Applicant: InterDigital VC Holdings, Inc.

Inventor： Celine GUEDE ,  Joan LLACH PINSACH ,  Kangying CAI

IPC: H04N19/597 ,  H04N19/103 ,  H04N19/147 ,  H04N19/17

CPC classification number: H04N19/597 ,  H04N19/103 ,  H04N19/147 ,  H04N19/17

Abstract: The present principles relate to a method and device method for encoding depth values of orthogonally projected points of a point cloud onto a projection plane. The present principles also relate to a method and device for decoding a point cloud, a computer readable program and a video signal.

公开(公告)号：US20200302652A1

公开(公告)日：2020-09-24

申请号：US16629772

申请日：2018-06-25

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Sebastien LASSERRE ,  Julien RICARD ,  Celine GUEDE

IPC: G06T9/40 ,  G06T3/40 ,  G06T3/00 ,  H04N19/597 ,  H04N19/96

Abstract: The present principles relates to a method and device for encoding an input colored point cloud representing the geometry and colors of a 3D object. The method comprises: —selecting (100) at least one face (Fi,j) of at least one cube (Cj) of an octree-based structure of projection according to at least one orthogonal projection of the point cloud onto said at least one face; and —encoding (120, 130) a pair of one texture image (TIi,j) and one depth (DIi,j) image per selected face (Fi,j) of a cube (Cj) by orthogonally projecting the part of the point cloud included in said cube (Cj) onto said selected face (Fi,j).

公开(公告)号：US20240005560A1

公开(公告)日：2024-01-04

申请号：US18225704

申请日：2023-07-25

Applicant: InterDigital VC Holdings, Inc.

Inventor： Julien RICARD ,  Celine GUEDE ,  Yannick OLIVIER ,  Joan LLACH PINSACH

IPC: G06T9/00

CPC classification number: G06T9/001

Abstract: At least one embodiment relates to a method comprising encoding a projection mode associated with an image region of a first depth image, said projection mode indicating if said image region stores either the minimum or the maximum depth value of at least one orthogonally projected 3D point of the point cloud along a same projection direction; and encoding said depth minimum and maximum depth values as a function of said projection mode.

公开(公告)号：US20230245268A1

公开(公告)日：2023-08-03

申请号：US18132939

申请日：2023-04-10

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Julien RICARD ,  Celine GUEDE ,  Jean-Claude CHEVET ,  David GENDRON ,  Yannick OLIVIER ,  Joan LLACH

IPC: G06T3/40 ,  G06T3/00 ,  G06T9/00

CPC classification number: G06T3/4007 ,  G06T3/0031 ,  G06T9/001

Abstract: The present embodiments relate to a method and device. The method comprises obtaining at least one first point from at least one point of a point cloud by projecting said point of the point cloud onto a projection plane and obtaining at least one other point of the point cloud determined according to said at least one first point; determining and encoding at least one interpolation coding mode for said at least one first point based on at least one reconstructed point obtained from said at least one first point and at least one interpolation point defined by said at least one interpolation coding mode to approximate said at least one other point of the point cloud; and signaling said at least interpolation coding mode as values of image data.

公开(公告)号：US20210274219A1

公开(公告)日：2021-09-02

申请号：US17258694

申请日：2019-07-11

Applicant: InterDigital VC Holdings, Inc.

Inventor： Julien RICARD ,  Celine GUEDE ,  Joan LLACH

IPC: H04N19/59 ,  G06T9/00 ,  H04N19/186

Abstract: At least one of the embodiment provides a method and device for generating and encoding in a bitstream an interpolation texture coding mode indicating that the bitstream contains color information data representative of a texture image and that texture interpolation has to be done on point of a reconstructed point cloud that are not colorized from said color information data.

公开(公告)号：US20210166435A1

公开(公告)日：2021-06-03

申请号：US16769560

申请日：2018-12-04

Applicant: InterDigital VC Holdings, Inc.

Inventor： Sebastien Lasserre ,  Julien RICARD ,  Celine GUEDE

IPC: G06T9/40 ,  G06T9/00 ,  H04N19/96

Abstract: At least one embodiment provides a method comprising encoding or decoding a coding model information representative of an encoding of points of a point cloud, said encoding being defined from at least one point belonging to a bounding box encompassing said points of the point cloud.

公开(公告)号：US20200273241A1

公开(公告)日：2020-08-27

申请号：US16753766

申请日：2018-10-02

Applicant: InterDigital VC Holdings, Inc.

Inventor： Kangying CAI ,  Joan LLACH PINSACH ,  Celine GUEDE

IPC: G06T17/00 ,  G06T7/90

Abstract: This method for hole filling of a point cloud having at least one hole comprises:—detecting (2) boundary points of the point cloud;—grouping (12) the detected boundary points in boundary regions based on their spatial adjacency;—covering (16) each boundary region with at least one plane; and—inserting (18) new points in the point cloud using the planes covering the boundary regions.

公开(公告)号：US20210201541A1

公开(公告)日：2021-07-01

申请号：US16756352

申请日：2018-10-17

Applicant: InterDigital VC Holdings, Inc.

Inventor： Sebastien LASSERRE ,  Celine GUEDE ,  Jean-Claude CHEVET

IPC: G06T9/40 ,  G06T9/00

Abstract: The present principles generally relate to encoding and decoding of a point cloud representing the geometry of a point cloud representing a 3D object. According to the invention, prediction is used in the encoding process of the splitting information of the local octree-based structure and/or in the 10 encoding process of the occupancy information of the leaf cubes of the local octree-based structure. A predictor of the local octree-based structure is used for determining the context of the context-dependent entropy encoding in order to reduce the number of bits needed for the octree encoding.