US 12,307,728 B2
Method and system for azimuthal angular prior and tree representation for cloud compression
Jonathan Taquet, Talensac (FR); and Sébastien Lasserre, Thorigné-fouillard (FR)
Assigned to BlackBerry Limited, Waterloo (CA)
Appl. No. 17/771,246
Filed by BlackBerry Limited, Waterloo (CA)
PCT Filed Oct. 31, 2019, PCT No. PCT/IB2019/001235
§ 371(c)(1), (2) Date Apr. 22, 2022,
PCT Pub. No. WO2021/084292, PCT Pub. Date May 6, 2021.
Prior Publication US 2022/0398784 A1, Dec. 15, 2022
Int. Cl. G06T 9/40 (2006.01)
CPC G06T 9/40 (2013.01) 18 Claims
OG exemplary drawing
 
1. A method of decoding a bitstream of compressed point cloud data representing a three-dimensional location of an object, for generating a point cloud data, the point cloud being located within a volumetric space and represented by a tree, the method comprising:
determining at least one closest, relative to azimuthal distance, coded node to a current node of the tree, wherein the determining excludes nodes that are larger in size than the current node and/or excludes nodes that are greater than a threshold azimuthal distance from the current node;
determining an azimuthal prediction angle for the at least one closest coded node;
selecting an angular azimuthal context based on the determined azimuthal prediction angle; and
decoding, from the bitstream, information representative of the current node based on the angular azimuthal context to generate the point cloud data.