Point cloud encoding and decoding method and device based on two-dimensional regularization plane projection

A point cloud encoding device based on a two-dimensional regularization plane projection, the point cloud encoding device being configured to:

• acquire original point cloud data;
• perform two-dimensional regularization plane projection on the original point cloud data to obtain a two-dimensional projection plane structure;
• obtain a plurality of pieces of two-dimensional image information according to the two-dimensional projection plane structure, wherein the plurality of pieces of two-dimensional image information comprise projection residual information including an azimuth angle residual ΔΦ;
• perform prediction on the azimuth angle residual ΔΦ based on depth information to obtain a predicted residual of the azimuth angle residual ΔΦ;
• and
• encode the predicted residual of the azimuth angle residual ΔΦ to obtain code stream information.

A point cloud decoding method based on a two-dimensional regularization plane projection, comprising:

• acquiring code stream information and decoding the code stream information to obtain parsed data, wherein the parsed data comprise a predicted residual of an azimuth angle residual ΔΦ;
• reconstructing a plurality of pieces of two-dimensional image information according to the parsed data;
• obtaining a two-dimensional projection plane structure according to the plurality of pieces of two-dimensional image information, wherein the plurality of pieces of two-dimensional image information comprise the azimuth angle residual ΔΦ;
• and
• reconstructing a point cloud by using the two-dimensional projection plane structure.