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

An electronic device, 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 electronic device to be 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 comprises a placeholder information map;
• and
• encode the plurality of pieces of two-dimensional image information to obtain code stream information, wherein the encoding the plurality of pieces of two-dimensional image information to obtain the code stream information comprises:
• encoding the placeholder information map to obtain a placeholder information code stream;
• wherein the encoding the placeholder information map to obtain the placeholder information code stream comprises:
• identifying an empty row and an empty column in the placeholder information map;
• encoding identifiers of the empty row and the empty column in the placeholder information map;
• and
• encoding placeholder information of pixels in a non-empty row and a non-empty column in the placeholder information map to obtain the placeholder information code stream.