Information processing device and method

An information processing method comprising the steps of generating a base mesh which is 3D data that represents a three-dimensional structure of an object by vertices and connections and has a smaller number of the vertices than a target mesh;

• generating a plurality of patches by dividing the target mesh and projecting the divided parts on the base mesh;
• generating a geometry image by arranging the patches on a frame image;
• encoding meta information including vertex connectivity information about the vertices and the connections of the base mesh;
• and
• encoding the geometry image.

An information processing device comprising:

• a meta information decoding unit configured to decode encoded data of meta information including vertex connectivity information which is information about vertices and connections of a base mesh;
• a geometry image decoding unit configured to decode encoded data of a geometry image which is a frame image having a patch arranged thereon,
• a vertex number increasing unit configured to increase the number of vertices of the base mesh using the vertex connectivity information;
• a patch reconstruction unit configured to reconstruct the patch using the geometry image and the base mesh with the increased number of vertices;
• a vertex information reconstruction unit configured to generate reconstructed vertex information about the vertices of the base mesh with the increased number of vertices by reconstructing three-dimensional positions of the vertices of the base mesh with the increased number of vertices using the reconstructed patch;
• wherein
• the base mesh is 3D data that represents a three-dimensional structure of an object by the vertices and the connections and has a smaller number of the vertices than a target mesh, and
• the patch is a divided part of the target mesh that represents the base mesh as a projection plane.

An information processing method comprising the steps of decoding encoded data of meta information including vertex connectivity information about vertices and connections of a base mesh;

• decoding encoded data of a geometry image which is a frame image having a patch arranged thereon;
• increasing the number of vertices of the base mesh using the vertex connectivity information;
• reconstructing the patch using the geometry image and the base mesh having the increased number of the vertices;
• and
• generating reconstructed vertex information about the vertices of the base mesh having the increased number of vertices by reconstructing three-dimensional positions of the vertices of the base mesh having the increased number of vertices using the reconstructed patch, wherein
• the base mesh is 3D data that represents a three-dimensional structure of an object by the vertices and the connections and has a smaller number of the vertices than a target mesh, and
• the patch is a divided part of the target mesh that represents the base mesh as a projection plane.