Title:
TRANSFORM METHOD, INVERSE TRANSFORM METHOD, ENCODER, DECODER AND STORAGE MEDIUM
Document Type and Number:
WIPO Patent Application WO/2021/062732
Kind Code:
A1
Abstract:
Provided in the embodiments of the present application are a transform method, an inverse transform method, an encoder, a decoder and a storage medium. The method comprises: determining two-dimensional Morton codes of points, to be encoded, in a preset space in a point cloud to be encoded, wherein the two-dimensional Morton code is a Morton code corresponding to two-dimensional coordinates and obtained by means of sequentially removing a certain component of three-dimensional coordinates of each point to be encoded; shifting each of the two-dimensional Morton codes to the right by K bits to obtain point sets respectively corresponding to three-dimensional coordinate components, wherein K is a positive integer greater than 1; determining, from the point sets, point quantities respectively corresponding to the three-dimensional coordinate components, which point quantities respectively correspond to the three-dimensional coordinate components and in which the number of included points to be encoded is the maximum; determining, on the basis of the point quantities, which respectively correspond to the three-dimensional coordinate components, a transform order corresponding to the preset space; carrying out region adaptive hierarchical transform (RAHT) on the basis of the transform order corresponding to the preset space; and writing the transform order and an attribute encoding result obtained after RAHT into an attribute bit stream.
Inventors:
ZHANG WEI (CN)
YANG FUZHENG (CN)
WAN SHUAI (CN)
MA YANZHUO (CN)
HUO JUNYAN (CN)
DAI NA (CN)
SUN ZEXING (CN)
YANG LIHUI (CN)
YANG FUZHENG (CN)
WAN SHUAI (CN)
MA YANZHUO (CN)
HUO JUNYAN (CN)
DAI NA (CN)
SUN ZEXING (CN)
YANG LIHUI (CN)
Application Number:
PCT/CN2019/109646
Publication Date:
April 08, 2021
Filing Date:
September 30, 2019
Export Citation:
Assignee:
GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD (CN)
International Classes:
H04N19/85; H04N19/50
Domestic Patent References:
| WO2019147816A1 | 2019-08-01 |
Foreign References:
| CN108833927A | 2018-11-16 | |||
| CN103136535A | 2013-06-05 | |||
| CN109196559A | 2019-01-11 | |||
| CN108171761A | 2018-06-15 | |||
| US20190228050A1 | 2019-07-25 |
Other References:
SANDRI GUSTAVO; FIGUEIREDO VICTOR F.; CHOU PHILIP A.; DE QUEIROZ RICARDO: "Point Cloud Compression Incorporating Region of Interest Coding", 2019 IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING (ICIP), 22 September 2019 (2019-09-22), pages 4370 - 4374, XP033647508, DOI: 10.1109/ICIP.2019.8803553
ZHANG QI; SHAO YITING; LI GE: "Point Clouds Attribute Compression Using Data-Adaptive Intra prediction", 2018 IEEE VISUAL COMMUNICATIONS AND IMAGE PROCESSING (VCIP), 9 December 2018 (2018-12-09), pages 1 - 4, XP033541914, DOI: 10.1109/VCIP.2018.8698681
ZHANG QI; SHAO YITING; LI GE: "Point Clouds Attribute Compression Using Data-Adaptive Intra prediction", 2018 IEEE VISUAL COMMUNICATIONS AND IMAGE PROCESSING (VCIP), 9 December 2018 (2018-12-09), pages 1 - 4, XP033541914, DOI: 10.1109/VCIP.2018.8698681
Attorney, Agent or Firm:
CHINA PAT INTELLECTUAL PROPERTY OFFICE (CN)
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