A SELECTIVE CODING METHOD BASED ON GLOBAL LOCAL MOTION INFORMATION/

A selective coding scheme is proposed that describes a method for codi ng image sequences, differentiating bits between background and target region. The suggested method initially estimates global motion parame ters and local motion vectors. Then segmentation is performed with a h ierarchical clustering scheme and a quad-tree algorithm in order to di vide a given image into the background and target region. Finally, ima ge coding is done by assigning more bits to the target region and less bits to background so that the target region may be reconstructed wit h a high quality. Simulations show that the suggested algorithm perfor ms well especially in the circumstances where background changes and t arget region is small enough compared to the background.