Information processing device and method

An information processing method comprising:

• generating low-definition vertex connection information;
• coding meta information that includes the low-definition vertex connection information;
• generating a geometry image by arranging patch images of a target mesh in frame images;
• and
• coding the geometry image,
• wherein the low-definition vertex connection information is vertex connection information regarding vertexes and connections of a low definition mesh, numbers of which are smaller than numbers of vertexes and connections of the target mesh,
• the low-definition mesh is 3D data that expresses a three-dimensional structure of an object by the vertexes and the connections,
• the target mesh is a target of coding, and
• the patch images express three-dimensional structures of a plurality of patches representing the divided low-definition mesh with two-dimensional coordinates on a projection plane and depth values from the projection plane.

An information processing device comprising:

• a meta information decoding unit that decodes coded data of meta information including low-definition vertex connection information;
• a geometry image decoding unit that decodes coded data of a geometry image in which patch images of a target mesh are arranged in frame images;
• a patch reconfiguration unit that reconfigures the patch images using the low-definition vertex connection information and the geometry image;
• a subdividing unit that subdivides polygons of the patch images obtained through the reconfiguration;
• and
• a mesh reconfiguration unit that reconfigures a mesh using the subdivided patch images,
• wherein
• the low-definition vertex connection information is vertex connection information regarding vertexes and connections of a low definition mesh, numbers of which are smaller than numbers of vertexes and connections of the target mesh,
• the low-definition mesh is 3D data that expresses a three-dimensional structure of an object by the vertexes and the connections,
• the target mesh is a target of coding, and
• the patch images express three-dimensional structures of a plurality of patches representing the divided low-definition mesh with two-dimensional coordinates on a projection plane and depth values from the projection plane.

An information processing method comprising:

• decoding coded data of meta information that includes low-definition vertex connection information;
• decoding coded data of a geometry image in which patch images of a target mesh are arranged in frame images;
• reconstructing patch images using the low-definition vertex connection information and the geometry image;
• subdividing polygons of the patch images obtained through the reconfiguration;
• and
• reconfiguring a mesh using the patch images obtained through the subdividing,
• wherein the low-definition vertex connection information is vertex connection information regarding vertexes and connections of a low-definition mesh,
• numbers of which are smaller than numbers of vertexes and connections of the target mesh,
• the low-definition mesh is 3D data that expresses a three-dimensional structure of an object by the vertexes and the connections,
• the target mesh is a target of coding, and
• the patch images express three-dimensional structures of a plurality of patches representing the divided low-definition mesh with two-dimensional coordinates on a projection plane and depth values from the projection plane.