Three-dimensional data encoding method, three-dimensional data decoding method, three-dimensional data encoding device, and three-dimensional data decoding device

Patent metadata

Field	Value
Publication number	US-12289470-B2
Application number	US-202318390138-A
Country	US
Kind code	B2
Filing date	Dec 20, 2023
Priority date	Feb 6, 2019
Publication date	Apr 29, 2025
Grant date	Apr 29, 2025

Abstract

A three-dimensional data encoding method includes: obtaining geometry information which includes first three-dimensional positions on a measurement target, and is generated by a measurer that radially emits an electromagnetic wave in different directions and obtains a reflected wave which is the electromagnetic wave that is reflected by the measurement target; generating a two-dimensional image including first pixels corresponding to the directions, based on the geometry information; and encoding the two-dimensional image to generate a bitstream. Each of the first pixels has a pixel value indicating a first three-dimensional position or attribute information of a three-dimensional point which is included in a three-dimensional point cloud and corresponds to a direction to which the first pixel corresponds among the directions.

First claim

What is claimed is:

1. A three-dimensional data encoding method, comprising:
obtaining a plurality of parameters including first horizontal angle information and first vertical angle information;
converting, using at least one of the plurality of parameters, orthogonal geometry information into polar geometry information including second horizontal angle information, second vertical angle information, and distance information from a reference point corresponding to each position of a point included in three-dimensional point data; and
encoding the polar geometry information.

2. The three-dimensional data encoding method according to claim 1 ,
wherein the reference point corresponds to a position of a measurer that generates the orthogonal geometry information.

3. The three-dimensional data encoding method according to claim 1 ,
wherein the orthogonal geometry information and the plurality of parameters are obtained from a measurer.

4. The three-dimensional data encoding method according to claim 1 , further comprising:
generating a two-dimensional image by projecting the polar geometry information converted on a vertical plane; and
encoding the two-dimensional image, wherein
the polar geometry information encoded includes the two-dimensional image encoded.

5. A three-dimensional data decoding method, comprising:
obtaining a plurality of parameters including first horizontal angle information and first vertical angle information;
decoding polar geometry information including second horizontal angle information, second vertical angle information, and distance information from a reference point corresponding to each position of a point included in three-dimensional point data;
converting, using at least one of the plurality of parameter, the polar geometry information into orthogonal geometry information.

6. The three-dimensional data decoding method according to claim 5 ,
wherein the reference point corresponds to a position of a measurer that generates the orthogonal geometry information.

7. The three-dimensional data decoding method according to claim 5 ,
wherein the plurality of parameters are generated from a measurer.

8. The three-dimensional data decoding method according to claim 5 , further comprising:
the polar geometry information include a two-dimensional image generated by projecting the three-dimensional point data on a vertical plane; and
decoding the two-dimensional image.

9. A three-dimensional data encoding device, comprising:
a processor; and
memory,
wherein using the memory, the processor:
obtaining a plurality of parameters including first horizontal angle information and first vertical angle information;
converting, using at least one of the plurality of parameters, orthogonal geometry information into polar geometry information including second horizontal angle information, second vertical angle information, and distance information from a reference point corresponding to each position of a point included in three-dimensional point data; and
encoding the polar geometry information.

10. A three-dimensional data decoding device, comprising:
a processor; and
memory,
wherein using the memory, the processor:
obtaining a plurality of parameters including first horizontal angle information and first vertical angle information;
decoding polar geometry information including second horizontal angle information, second vertical angle information, and distance information from a reference point corresponding to each position of a point included in three-dimensional point data;
converting, using at least one of the plurality of parameter, the polar geometry information into orthogonal geometry information.

Assignees

• Panasonic Ip Corp America

Inventors

• Sugio Toshiyasu
• Iguchi Noritaka
• Lasang Pongsak
• Wang Chi
• Han Chung Dean

Classifications

• G01S17/89

  for mapping or imaging · CPC title

• H04N13/282

  for generating image signals corresponding to three or more geometrical viewpoints, e.g. multi-view systems · CPC title

• H04N13/246

  Calibration of cameras · CPC title

• H04N19/85

  using pre-processing or post-processing specially adapted for video compression · CPC title

• H04N19/46

  Embedding additional information in the video signal during the compression process (H04N19/517, H04N19/68, H04N19/70 take precedence) · CPC title