US 11,954,890 B2
Apparatus and method for fast refining segmentation for V-PCC encoders
Yong Hwan Kim, Anyang-si (KR); Jieon Kim, Seoul (KR); JinGang Huh, Seoul (KR); and Jong-geun Park, Seoul (KR)
Assigned to Korea Electronics Technology Institute, Seongnam-si (KR)
Filed by KOREA ELECTRONICS TECHNOLOGY INSTITUTE, Seongnam-si (KR)
Filed on Apr. 16, 2021, as Appl. No. 17/233,195.
Claims priority of application No. 10-2020-0162491 (KR), filed on Nov. 27, 2020.
Prior Publication US 2022/0172404 A1, Jun. 2, 2022
Int. Cl. G06T 9/00 (2006.01); G06T 3/40 (2006.01); H03M 7/30 (2006.01)
CPC G06T 9/001 (2013.01) [G06T 3/40 (2013.01); H03M 7/3064 (2013.01); H03M 7/6011 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An apparatus for fast refining segmentation for a video-based point cloud compression (V-PCC) encoder, the apparatus comprising:
a grid segmentator configured to segment a coordinate space of a point cloud into grid units;
an edge cube searcher configured to search an edge cube containing one or more points among the cubes segmented into grid units and containing a segment boundary;
a surrounding cube searcher configured to search an edge surrounding cube containing one or more points within a predetermined range from the edge cube;
a smooth score calculator configured to calculate smooth scores for all the edge surrounding cubes and all the edge cubes; and
a projection plane index updater configured to obtain a normal score based on the calculated smooth scores and update a projection plane index of each point in the edge cube using the normal score,
wherein the edge cube searcher is configured to:
search a direct edge cube containing two or more points, and
search an indirect edge cube located around the edge cube and containing one or more points.