Displacement coding for mesh compression

An apparatus for video encoding, the apparatus comprising:

• at least one memory configured to store computer program code;
• at least one processor configured to access the computer program code and operate as instructed by the computer program code, the computer program code including:
• obtaining code configured to cause the at least one processor to obtain volumetric data of at least one three-dimensional (3D) visual content;
• deriving code configured to cause the at least one processor to derive a mesh from a frame of the volumetric data, the mesh comprising a plurality of base mesh vertices;
• determining code configured to cause the at least one processor to determine a displacement of at least one vertex, that is not of the base mesh vertices, based on a series of projections from at least one of the plurality of base mesh vertices that is a neighboring one of the plurality of base mesh vertices to the at least one vertex;
• predicting code configured to cause the at least one processor to predict the at least one vertex based at least on the determined displacement;
• and
• encoding code configured to cause the at least one processor to encode the volumetric data based on determining the predicted at least one vertex.

A non-transitory computer readable medium storing a program causing a computer to:

• obtain volumetric data of at least one three-dimensional (3D) visual content;
• derive a mesh from a frame of the volumetric data, the mesh comprising a plurality of base mesh vertices;
• determine a displacement of at least one vertex, that is not of the base mesh vertices, based on a series of projections from at least one of the plurality of base mesh vertices that is a neighboring one of the plurality of base mesh vertices to the at least one vertex;
• and
• encode the volumetric data based on determining the predicted at least one vertex.