US 12,307,727 B2
Method and device for encoding/reconstructing attributes of points of a point cloud
Yannick Olivier, Thorigne Fouillard (FR); Jean-Claude Chevet, Betton (FR); and Joan Llach, London (GB)
Assigned to INTERDIGITAL VC HOLDINGS, INC., Wilmington, DE (US)
Filed by INTERDIGITAL VC HOLDINGS, INC., Wilmington, DE (US)
Filed on Jan. 24, 2024, as Appl. No. 18/421,740.
Application 18/421,740 is a continuation of application No. 17/282,555, granted, now 11,915,456, previously published as PCT/US2019/054637, filed on Oct. 4, 2019.
Claims priority of application No. 18306318 (EP), filed on Oct. 5, 2018; and application No. 19305307 (EP), filed on Mar. 14, 2019.
Prior Publication US 2024/0169597 A1, May 23, 2024
Int. Cl. G06T 9/00 (2006.01); G06T 7/10 (2017.01)
CPC G06T 9/001 (2013.01) [G06T 7/10 (2017.01); G06T 2207/20021 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method comprising:
obtaining a patch from a geometry image, wherein pixel values of the patch comprise differential 3D coordinates of at least one point of a point cloud,
decoding an information representative of three shift values to be applied to points reconstructed from the patch along respectively a tangent axis, a bitangent axis and a normal axis, wherein decoding the information representative of the three shift values is based on a difference between a bitdepth used for representing 3D coordinates of points of the point cloud and a bitdepth of a decoder used for decoding the geometry image obtaining 3D coordinates of a reference point of the patch from the decoded information and the bitdepth of the decoder used for decoding the geometry image, reconstructing 3D coordinates of the at least one point based on the 3D coordinates of the reference point.