Supervised segmentation at low bit rates for region representation and color image compression

We present a new coding scheme providing compression efficiency (better subjective quality than JPEG2000) and region-level functionalities at low bit-rates for both the sender and the receiver. A contourless coding region description is obtained by a segmentation process at the sender and receiver, supervised by chromatic consistency and operating on a well adapted low resolution Y image. Chromatic images can then be region-based encoded at very low cost. As the region topology fully matches the representation used to encode the content, further enhancement can be globally applied over the whole image or limited to a region of interest.