JPWO2020072865A5

JPWO2020072865A5 -

Info

Publication number: JPWO2020072865A5
Application number: JP2021518752A
Authority: JP
Publication date: 2022-10-13

Claims

- subdividing the bounding box bounding the points of the point cloud into a plurality of subdivisions;
- encoding data representing attributes of points of said point cloud by reference to the subdivision to which said points belong.

2. The method of claim 1, further comprising encoding data representing the number of points included in each subdivision.

2. The method of claim 1, wherein the subdivision of the bounding box depends on the bit depth of an encoder used to encode the points.

2. The method of claim 1, wherein a point attribute corresponds to geometry or texture/color information of said point.

- subdividing the bounding box bounding the points of the point cloud into a plurality of subdivisions;
- encoding data representing attributes of points of said point cloud by reference to the subdivision to which said points belong;

6. The apparatus of Claim 5, wherein the processor is further configured for encoding data representing the number of points included in each subdivision.

6. Apparatus according to claim 5, wherein the subdivision of the bounding box depends on the bit depth of an encoder used to encode the points.

6. The apparatus of claim 5, wherein a point attribute corresponds to geometry or texture/color information of said point.

- decoding data representing attributes of points of a point cloud by reference to the subdivision to which said points belong, said subdivision being by dividing a bounding box bounding said points of said point cloud; being one of the plurality of subdivisions obtained;
- reconstructing point attributes from said decoded data.

7. The method of claim 6, further comprising decoding data representing the number of points included in each subdivision of the bounding box, and further reconstructing point attributes from the number of points. 10. The method of claim 9.

10. The method of claim 9, wherein point attributes are reconstructed from the decoded data reconstructing points of the reconstructed point cloud by decoding at least one geometry and attribute image. described method.

Reconstructing the attributes of points includes obtaining 2D patches for subdivision from the decoded geometry image, and pixel values from coordinates obtained from the 2D patches and coordinates of reference points of the 2D patches. 10. The method of claim 9, further comprising obtaining 3D coordinates of .

10. The method of claim 9, wherein the subdivision of the bounding box depends on the bit depth of an encoder used to encode the points.

10. The method of claim 9, wherein a point attribute corresponds to geometry or texture/color information of said point.

- decoding data representing attributes of points of a point cloud by reference to the subdivision to which said points belong, said subdivision being by dividing a bounding box bounding said points of said point cloud; being one of the plurality of subdivisions obtained;
- an apparatus comprising a processor configured for: reconstructing point attributes from said decoded data;

The processor is further configured for decoding data representing the number of points included in each subdivision of the bounding box, and further reconstructing point attributes from the number of points. 16. Apparatus according to claim 15, wherein

16. The method of claim 15, wherein point attributes are reconstructed from the decoded data reconstructing points of the reconstructed point cloud by decoding at least one geometry and attribute image. Apparatus as described.

Reconstructing the attributes of points includes obtaining 2D patches for subdivision from the decoded geometry image, and pixel values from coordinates obtained from the 2D patches and coordinates of reference points of the 2D patches. 16. The apparatus of claim 15, further comprising obtaining 3D coordinates of .

16. The apparatus of claim 15, wherein the subdivision of the bounding box depends on the bit depth of a decoder used to decode the points.

16. The apparatus of claim 15, wherein a point attribute corresponds to geometry or texture/color information of said point.

A computer program, when said program is executed by one or more processors, said one or more processors comprising:
- decoding data representing attributes of points of a point cloud by reference to the subdivision to which said points belong, said subdivision being by dividing a bounding box bounding said points of said point cloud; being one of the plurality of subdivisions obtained;
- a computer program comprising instructions for performing a method comprising reconstructing point attributes from said decoded data;

on one or more processors,
- decoding data representing attributes of points of a point cloud by reference to the subdivision to which said points belong, said subdivision being by dividing a bounding box bounding said points of said point cloud; being one of the plurality of subdivisions obtained;
- a non-transitory computer-readable medium, characterized in that it contains instructions for reconstructing point attributes from said decoded data;