公开(公告)号：US12184849B2

公开(公告)日：2024-12-31

申请号：US18058634

申请日：2022-11-23

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Yong Hwan Kim ,  Yura Kim ,  Jong-geun Park ,  Hyun Ho Kim

IPC: H04N7/12 ,  H04N19/119 ,  H04N19/136 ,  H04N19/167 ,  H04N19/423 ,  H04N19/85

Abstract: A device and method for performing fast grid-based refining segmentation (FGRS) for video-based point cloud compression (V-PCC) is proposed. The method may include dividing a space of a three-dimensional (3D) point cloud into multiple grids to derive multiple voxels, searching for filled voxels including one or more points, searching for surrounding voxels which are filled voxels within a certain radius from each of the filled voxels, and searching for edge voxels which are present at a segment edge among all the filled voxels. The method may also include calculating smooth scores for surrounding voxels of each edge voxel and calculating a smooth score sum which is a smooth score for the edge voxel on the basis of the smooth scores of the surrounding voxels of the edge voxel, and updating a projection plane index (PPI) for each individual point in the edge voxel using the calculated smooth score sum.

公开(公告)号：US12256055B2

公开(公告)日：2025-03-18

申请号：US18332596

申请日：2023-06-09

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Sung-Gyun Lim ,  Yong Hwan Kim ,  Hyun-Ho Kim ,  Yura Kim

IPC: H04N13/161 ,  H04N19/136

Abstract: A patch based depth mapping method and apparatus for high-efficiency encoding/decoding of a plenoptic video is proposed. The method may be performed in an electronic apparatus to classify a reference image and an additional image from a plenoptic video during encoding the plenoptic video and then generate an atlas including a patch using the additional image. The method may include mapping a depth value by applying minimum-maximum linear scaling in units of an input viewpoint image. The method may also include finding a minimum value and a maximum value of the depth value per the patch and remapping the depth value through minimum-maximum linear scaling.

公开(公告)号：US20240098263A1

公开(公告)日：2024-03-21

申请号：US18058634

申请日：2022-11-23

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Yong Hwan Kim ,  Yura Kim ,  Jong-geun Park ,  Hyun Ho Kim

IPC: H04N19/119 ,  H04N19/136 ,  H04N19/167 ,  H04N19/85

CPC classification number: H04N19/119 ,  H04N19/136 ,  H04N19/167 ,  H04N19/85

Abstract: A device and method for performing fast grid-based refining segmentation (FGRS) for video-based point cloud compression (V-PCC) is proposed. The method may include dividing a space of a three-dimensional (3D) point cloud into multiple grids to derive multiple voxels, searching for filled voxels including one or more points, searching for surrounding voxels which are filled voxels within a certain radius from each of the filled voxels, and searching for edge voxels which are present at a segment edge among all the filled voxels. The method may also include calculating smooth scores for surrounding voxels of each edge voxel and calculating a smooth score sum which is a smooth score for the edge voxel on the basis of the smooth scores of the surrounding voxels of the edge voxel, and updating a projection plane index (PPI) for each individual point in the edge voxel using the calculated smooth score sum.