公开(公告)号：US11765397B2

公开(公告)日：2023-09-19

申请号：US16754028

申请日：2018-10-03

Applicant: InterDigital VC Holdings, Inc.

Inventor： Julien Ricard ,  Sebastien Lasserre ,  Celine Guede

IPC: H04N19/96 ,  H04N19/147 ,  H04N19/186 ,  G06T9/40

CPC classification number: H04N19/96 ,  G06T9/40 ,  H04N19/147 ,  H04N19/186

Abstract: The present principles a method and a device for encoding the colors of a point cloud (IPC) representing a 3D object. The method is characterized in that the method comprises: —obtaining (210) a set of points (SP) approximating the geometry of said point cloud (IPC); —encoding (220) a color information data indicating that the color of at least one of the point of said set of points is encoded in a bitstream and that the colors of the other points of said set of points are not encoded in the bitstream. The present principles also relates to a method and a device for decoding the colors of a point cloud.

公开(公告)号：US11455748B2

公开(公告)日：2022-09-27

申请号：US16753782

申请日：2018-10-02

Applicant: InterDigital VC Holdings, Inc.

Inventor： Kangying Cai ,  Celine Guede ,  Joan Llach Pinsach ,  Sebastien Lasserre

IPC: G06T9/00 ,  G06T19/20

Abstract: This method for up-sampling a point cloud representing a 3D object, comprises: —detecting (2) points belonging to at least one under-sampled region of the point cloud on the basis of at least one desirable sampling rate (K); —obtaining (12), for each detected point, an associated tangent plane; —inserting (14) in the point cloud at least one neighboring point of each detected point if a distance between the neighboring point and the tangent plane associated with the detected point is less than a first threshold.

公开(公告)号：US11250597B2

公开(公告)日：2022-02-15

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.

公开(公告)号：US12223683B2

公开(公告)日：2025-02-11

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

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：US12106526B2

公开(公告)日：2024-10-01

申请号：US17259040

申请日：2019-07-10

Applicant: InterDigital VC Holdings, Inc.

Inventor： Julien Ricard ,  Celine Guede ,  Yannick Olivier

IPC: G06K9/00 ,  G06T7/50 ,  G06T9/00

CPC classification number: G06T9/00 ,  G06T7/50 ,  G06T2207/10028

Abstract: At least a method and an apparatus are presented for efficiently encoding or decoding video. For example, a 2-D patch of the point cloud is obtained by projecting 3-D points of the point cloud onto a projection plane, the patch having a plurality of pixels. The patch is divided into a plurality of smaller blocks. The number of pixels is determined within each of the plurality of smaller blocks. An updated occupancy map is obtained based on the determined number of pixels within each of the plurality of smaller blocks. A reconstructed point cloud is obtained based on the updated occupancy map, wherein the reconstructed point cloud is a less dense representation of the point cloud.

公开(公告)号：US20220005231A1

公开(公告)日：2022-01-06

申请号：US17282496

申请日：2019-10-04

Applicant: InterDigital VC Holdings, Inc.

Inventor： Julien Ricard ,  Celine Guede ,  Joan Llach

IPC: G06T9/00 ,  G06T17/20 ,  G06K9/62

Abstract: The present embodiments relate to a method for encoding 3D points whose geometry is represented by geometry images and attribute is represented by an attribute image. The method checks whether the depth value of a pixel in a first of said geometry images and the depth value of a co-located pixel in a second of said geometry images are not the same (not identical values). When the depth value of a pixel in said first geometry image and the depth value of the co-located pixel in said second geometry image are not the same, then the method assigns (encodes), attribute of a 3D point defined from 2D spatial coordinates of said pixel in said first geometry image and the depth value of said co-located pixel in the second geometry image.

公开(公告)号：US20250029284A1

公开(公告)日：2025-01-23

申请号：US18902866

申请日：2024-09-30

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Joan Llach ,  Celine Guede ,  Jean-Claude Chevet

IPC: G06T9/00

Abstract: At least one embodiment relates to a method assigning a pixel value of an occupancy map either indicates that a depth value of at least one 3D sample of a point cloud frame projected along a same projection line is stored as a pixel value of at least one layer or equals a fixed-length codeword representing a depth value of at least one 3D sample projection along said projection line.

公开(公告)号：US12094177B2

公开(公告)日：2024-09-17

申请号：US17439171

申请日：2020-01-27

Applicant: InterDigital VC Holdings, Inc.

Inventor： Celine Guede ,  Julien Ricard ,  Joan Llach

IPC: G06K9/00 ,  G06T9/00 ,  H04N19/184 ,  H04N19/70

CPC classification number: G06T9/00 ,  H04N19/184 ,  H04N19/70

Abstract: At least one embodiment relates to a method for signaling a syntax element representing a Point Local Reconstruction mode, said Point Local Reconstruction mode being representative of at least one parameter defining a mode for reconstructing at least one point of a point cloud frame.

公开(公告)号：US20240169593A1

公开(公告)日：2024-05-23

申请号：US18402142

申请日：2024-01-02

Applicant: InterDigital VC Holdings, Inc.

Inventor： Julien RICARD ,  Celine Guede ,  Yannick Olivier ,  Joan Llach Pinsach ,  David Gendron

IPC: G06T9/00 ,  H04N19/184 ,  H04N19/186

CPC classification number: G06T9/00 ,  H04N19/184 ,  H04N19/186

Abstract: Described are methods and devices for adding at least one 3D sample to a point cloud frame and for assigning a color-coding mode to said at least one 3D sample, said color-coding mode indicating if color information associated with said at least one 3D sample is explicitly encoded in a bitstream or if said color information is implicit.

公开(公告)号：US11625809B2

公开(公告)日：2023-04-11

申请号：US17259058

申请日：2019-06-28

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

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.