Encoding method and apparatus, decoding method and apparatus, and device

A decoding method, comprising:

• decoding, by a decoding end, a first bitstream to obtain decoding information, wherein the decoding information comprises first indication information and one or two groups of non-manifold structure information, and each group of non-manifold structure information comprises non-manifold identification information of a target vertex and index information of a target duplicate vertex;
• the target vertex comprises a geometric vertex and an attribute vertex in a manifold mesh, wherein the manifold mesh is obtained by performing splitting processing on a non-manifold structure in an original mesh, and the non-manifold identification information is used for indicating whether the target vertex is a duplicate vertex generated by performing splitting processing on the non-manifold structure;
• the target duplicate vertex is a duplicate vertex generated by performing splitting processing on the non-manifold structure in the original mesh by the encoding end, and the target duplicate vertex comprises a geometric duplicate vertex and an attribute duplicate vertex;
• and the first indication information is used to indicate whether geometric vertices and attribute vertices in the original mesh have a same connection relationship;
• and
• restoring, by the decoding end, the non-manifold structure in the original mesh based on the decoding information.

An electronic device, comprising a processor and a memory, wherein a program or instructions capable of running on the processor are stored in the memory, wherein the program or instructions, when executed by the processor, cause the electronic device to perform:

• decoding a first bitstream to obtain decoding information, wherein the decoding information comprises first indication information and one or two groups of non-manifold structure information, and each group of non-manifold structure information comprises non-manifold identification information of a target vertex and index information of a target duplicate vertex;
• the target vertex comprises a geometric vertex and an attribute vertex in a manifold mesh, wherein the manifold mesh is obtained by performing splitting processing on a non-manifold structure in an original mesh, and the non-manifold identification information is used for indicating whether the target vertex is a duplicate vertex generated by performing splitting processing on the non-manifold structure;
• the target duplicate vertex is a duplicate vertex generated by performing splitting processing on the non-manifold structure in the original mesh by the encoding end, and the target duplicate vertex comprises a geometric duplicate vertex and an attribute duplicate vertex;
• and the first indication information is used to indicate whether geometric vertices and attribute vertices in the original mesh have a same connection relationship;
• and
• restoring the non-manifold structure in the original mesh based on the decoding information.