Patent ID: 11954891
Assignee: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A method of compressing an occupancy map of a three-dimensional (3D) point cloud, the method comprising the steps of:
(a) generating an occupancy map image using occupancy map information, compressing the occupancy map image using a video codec, and decompressing the compressed occupancy map image; and
(b) recompressing the occupancy map image generated in the step (a) in consideration of at least one of a user-specified compression quality and a patch-by-patch inspection result of the occupancy map image decompressed in the step (a);
wherein the step (b) includes, in consideration of the patch-by-patch inspection result, inspecting whether an occupied pixel exists for each patch of the occupancy map image decompressed in the step (a) and, in response to existence of a patch having no occupied pixels, lowering a quantization parameter (QP) value for the decompressed occupancy map image to be less than or equal to a preset value and recompressing the occupancy map image generated in the step (a).