Performance analysis of model-based video coding

We study the performance associated with model-based video coding schemes using global motion models for motion compensation. Reference frames and compensated frame differences are coded using a method similar to MPEG, employing transform coding, quantization, and entropy coding. The traditional block matching motion compensation approach is compared to global motion compensation approaches derived from 3D motion stabilization methods, using similarity and projective transformations. 3D model-based motion compensation is achieved by derotating the input sequence. This leads to a projective transformation, which under certain circumstances, is well approximated by a similarity transformation. Experiments are carried out to analyze the performance of each scheme for comparable coding rates