公开(公告)号：US20200258262A1

公开(公告)日：2020-08-13

申请号：US16755635

申请日：2018-10-11

Applicant: InterDigital VC Holdings, Inc.

Inventor： Sebastien LASSERRE ,  Saurabh PURI ,  Kangying CAI ,  Julien RICARD ,  Celien GUEDE

IPC: G06T9/00 ,  G06T3/00 ,  G06F17/16

Abstract: This method for inter-predictive encoding of a time-varying 3D point cloud including a series of successive frames divided in 3D blocks into at least one bitstream comprises encoding (20) 3D motion information including a geometric transformation comprising rotation information representative of a rotation transformation and translation information representative of a translation transformation, wherein the translation information comprises a vector ΔT representing an estimation error of the translation transformation.

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：US20200092584A1

公开(公告)日：2020-03-19

申请号：US16616491

申请日：2018-04-12

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Kangying CAI ,  Wei HU ,  Sebastien LASSERRE

IPC: H04N19/62 ,  H04N19/18

Abstract: This method comprises: —accessing (2) a point cloud (PC) comprising a plurality of points defined by attributes, said attributes including a spatial position of a point in a 3D space and at least one feature of the point;—segmenting (2) the point cloud into one or more clusters (Ci) of points on the basis of the attributes of the points; and for at least one cluster (Ci):—constructing (4) a similarity graph having a plurality of vertices and at least one edge, the similarity graph representing a similarity among neighboring points of the cluster (Ci) in terms of the attributes, the plurality of vertices including vertices Pi and Pj corresponding to points of the cluster (Ci);—assigning one or more weights wi,j to one or more edges connecting vertices Pi and Pj of the graph;—computing (6) a transform using the one or more assigned weights, said transform being characterized by coefficients; and—quantizing (8) and encoding (10) the transform coefficients.

公开(公告)号：US20210112277A1

公开(公告)日：2021-04-15

申请号：US17046630

申请日：2019-04-01

Applicant: InterDigital VC Holdings, Inc.

Inventor： Julien Ricard ,  Joan LLACH PiNSACH ,  Kangying CAI

IPC: H04N19/597 ,  G06T17/00 ,  G06T9/00

Abstract: This method comprises:—orthogonally projecting at least one point of a point cloud along projection lines; and—for at least two points of a same projection line, signaling in a bitstream whether a position of said projection line between a nearer and a farther points of said projection line is occupied or not.

公开(公告)号：US20230026080A1

公开(公告)日：2023-01-26

申请号：US17945672

申请日：2022-09-15

Applicant: InterDigital VC Holdings, Inc.

Inventor： Celine GUEDE ,  Joan LLACH PINSACH ,  Kangying CAI

IPC: 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：US20200258261A1

公开(公告)日：2020-08-13

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：US20200258202A1

公开(公告)日：2020-08-13

申请号：US16753773

申请日：2018-10-03

Applicant: InterDigital VC Holdings, Inc.

Inventor： Kangying CAI ,  Julien RICHARD ,  Celine GUEDE

IPC: G06T5/00 ,  G06T9/40 ,  G06T19/00

Abstract: The present disclosure concerns a method for reconstructing a point cloud representing a 3D object from an inverse projected point cloud (IPPC) obtained by inverse-projecting at least one depth image of an original point cloud, said at least one depth image being obtained by projecting the points of the original point cloud onto at least one surface, said method comprising the steps of; detecting (900) at least one missing part (MPtfj in the inverse-projected point cloud (IPPC), and completing (910) said at least one missing part (MPq) based on points in the neighborhood of said at least one missing part.

公开(公告)号：US20200219275A1

公开(公告)日：2020-07-09

申请号：US16624639

申请日：2018-06-18

Applicant: INTERDIGITAL VC HOLDINGS, INC,

Inventor： Kangying CAI ,  Sebastien LASSERRE

IPC: G06T7/50 ,  G06T7/10 ,  G06T9/00 ,  G06T11/00 ,  G06T17/20

Abstract: This method for encoding a 3D point cloud comprises: —segmenting the point cloud into first patches (2); —determining inverse projection parameters of the patches (4); —projecting the first patches to planes using the inverse projection parameters (10); —encoding the planes (12); —determining sparse points in the point cloud not belonging to any patch (HC, 18); and—encoding the sparse points using an octree-decomposition (20).

公开(公告)号：US20210183109A1

公开(公告)日：2021-06-17

申请号：US17046642

申请日：2019-04-03

Applicant: INTERDIGITAL VC HOLDINGS, INC.

Inventor： Jean-Claude CHEVET ,  Yannick OLIVIER ,  Kangying CAI

IPC: G06T9/00

Abstract: At least one embodiment relates to a method comprising obtaining an occupancy information indicating if blocks of a 2D regular grid defined over a projection plane are associated with depth information of an orthogonal projection of at least one point of a point cloud onto said projection plane; embedding said occupancy information in an image storing said depth information; and encoding said image.

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.