Point cloud data transmitting device, point cloud data transmitting method, point cloud data receiving device, and point cloud data receiving method
摘要
說明書
The point cloud encoder 10002 according to the embodiments may perform patch packing and generate an occupancy map.
Patch Packing & Occupancy Map Generation (40001)
This is a process of determining the positions of individual patches in a 2D image to map the segmented patches to the 2D image. The occupancy map, which is a kind of 2D image, is a binary map that indicates whether there is data at a corresponding position, using a value of 0 or 1. The occupancy map is composed of blocks and the resolution thereof may be determined by the size of the block. For example, when the block is 1*1 block, a pixel-level resolution is obtained. The occupancy packing block size may be determined by the user.
The process of determining the positions of individual patches on the occupancy map may be configured as follows:
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- 1) Set all positions on the occupancy map to 0;
- 2) Place a patch at a point (u, v) having a horizontal coordinate within the range of (0, occupancySizeU-patch.sizeU0) and a vertical coordinate within the range of (0, occupancySizeV-patch.sizeV0) in the occupancy map plane;
- 3) Set a point (x, y) having a horizontal coordinate within the range of (0, patch.sizeU0) and a vertical coordinate within the range of (0, patch.sizeV0) in the patch plane as a current point;
