A Three-Level Hierarchical Encoder Using Shape Independent Transform
Martin Mojzeš, Jaroslav Polec · 2007
Abstract. In this paper a scheme for utilizing shape inde-pendent basis functions for a hierarchical multiresolution image compression is shown. First, an image is segmented and its segments ' boundaries are polygon approximated, thus achieving an image mask. Second, this image mask and the image are used as an input of a three-level hierarchical encoder. The hierarchical encoder sub-samples the image and the image mask and encodes them shape independently; it produces an output bit stream on a respective level that is also used on lower level(s) for further coding. On the base level a triangulation of the image mask is performed for superior performance. Another compression mode is, hence, introduced for the shape independent transform coding.