Point Cloud Sequence Encoding/Decoding Method and Apparatus Based on Two-Dimensional Regularized Plane Projection

A point cloud sequence decoding method, based on two-dimensional regularized plane projection, the method comprising:

• acquiring bit stream information of reference-frame point cloud data and current-frame point cloud data and decoding the bit stream information of the current-frame point cloud data to obtain parsed data;
• performing two-dimensional regularized plane projection on the reference-frame point cloud data to obtain a first two-dimensional projection plane structure;
• performing motion compensation based on the parsed data and one or more pieces of first two-dimensional graphic information obtained from the first two-dimensional projection plane structure to obtain one or more pieces of reconstructed second two-dimensional graphic information;
• obtaining a second two-dimensional projection plane structure based on the one or more pieces of reconstructed second two-dimensional graphic information;
• reconstructing a current-frame point cloud by using the second two-dimensional projection plane structure;
• and
• repeating the foregoing steps to decode a plurality of frames of a point cloud sequence.

A point cloud sequence encoding apparatus, comprising:

• one or more processors;
• and
• one or more memories coupled to the one or more processors and storing instructions that, when executed by the one or more processors, cause the apparatus to be configured to:
• acquire reference-frame point cloud data and current-frame point cloud data;
• perform two-dimensional regularized plane projection on the reference-frame point cloud data to obtain a first two-dimensional projection plane structure;
• perform two-dimensional regularized plane projection on the current-frame point cloud data to obtain a second two-dimensional projection plane structure;
• perform motion compensation and encoding on one or more pieces of first two-dimensional graphic information obtained based on the first two-dimensional projection plane structure and one or more pieces of second two-dimensional graphic information obtained based on the second two-dimensional projection plane structure to obtain bit stream information of the current-frame point cloud data;
• and
• repeat the foregoing steps to encode a plurality of frames of a point cloud sequence.