Method and device for processing graph-based signal using geometric primitives

A method of processing a graph-based video signal, comprising:

• receiving an edge weight;
• generating a transform matrix using the edge weight, wherein the transform matrix is mapped based on the edge weight of edges within a target block;
• obtaining a transform coefficient using the transform matrix;
• and
• reconstructing the graph-based video signal based on the obtained transform coefficient.

An apparatus of encoding a graph-based signal using a geometric primitive, comprising:

• a processor configured to
• specify the geometric primitive to be used for calculating an edge weight,
• obtain a parameter for each of the geometric primitive,
• calculate an edge weight for each of edges within the image based on the parameter, and
• encode the image based on the edge weight.

An apparatus of decoding a graph-based video signal, comprising:

• a processor configured to
• receive an edge weight,
• obtain a modified residual signal by applying the edge weight to a residual signal, and
• reconstruct the graph-based video signal based on the modified residual signal,
• wherein the transform matrix is mapped based on the edge weight of edges within a target block.