Method and apparatus for encoding geometry patterns, and method for apparatus for decoding geometry patterns

A method for decoding a plurality of geometry patterns, wherein the geometry patterns are connected components of one or more 3D mesh models, the method comprising:

• decoding first data to obtain a cluster representative surface;
• decoding second data and third data to obtain at least two displacement maps;
• reconstructing the cluster representative surface;
• reconstructing a first geometry pattern by applying a first displacement map of the at least two displacement maps to the cluster representative surface;
• and
• reconstructing a second geometry pattern by applying a second displacement map of the at least two displacement maps to the cluster representative surface.

A device for encoding a plurality of geometry patterns that are connected components of one or more 3D mesh models, comprising

• a detector configured to detect similar geometry patterns;
• a clustering module configured to cluster the detected similar geometry patterns in a common cluster;
• a calculator configured to generate a cluster representative surface;
• a displacement map generator configured to generate for at least two clustered geometry patterns individual displacement maps, wherein each displacement map defines a displacement between vertices of the cluster representative surface and vertices of a clustered geometry pattern;
• and
• an encoder configured to encode the plurality of geometry patterns via the cluster representative surface and the displacement maps.

A device for decoding a plurality of geometry patterns that are connected components of one or more 3D mesh models, comprising

• a first decoder configured to decode first data to obtain a cluster representative surface;
• a second decoder configured to decode second data to obtain at least two displacement maps;
• a first reconstructing module configured to reconstruct the cluster representative surface;
• a second reconstructing module configured to reconstruct a first geometry pattern by applying a first displacement map of the at least two displacement maps to the cluster representative surface;
• and
• a third reconstructing module configured to reconstruct second geometry pattern by applying a second displacement map of the at least two displacement maps to the cluster representative surface.

An apparatus for encoding a plurality of geometry patterns, wherein the geometry patterns are connected components of one or more 3D mesh models, the apparatus comprising a processor and a memory having stored thereon computer executable instructions that when executed configure the processor to

• detect similar geometry patterns;
• cluster the detected similar geometry patterns in a common cluster;
• generate a cluster representative surface;
• generate for at least two clustered geometry patterns individual displacement maps, wherein each displacement map defines a displacement between vertices of the cluster representative surface and vertices of a clustered geometry pattern;
• and
• encode the plurality of geometry patterns by encoding the representative surface and the displacement maps.

An apparatus for decoding a plurality of geometry patterns, wherein the geometry patterns are connected components of one or more 3D mesh models, the apparatus comprising a processor and a memory having stored thereon computer executable instructions that when executed configure the processor to

• decode first data to obtain a cluster representative surface;
• decode second data and third data to obtain at least two displacement maps;
• reconstruct the cluster representative surface;
• reconstruct a first geometry pattern by applying a first displacement map of the at least two displacement maps to the cluster representative surface;
• and
• reconstruct a second geometry pattern by applying a second displacement map of the at least two displacement maps to the cluster representative surface.