An adaptive DPCM quality image compression method based on edge direction
Zhao De · Ha'erbin gongye daxue xuebao · 2000
Presents first image coding methods and then a new guality image compression method based on edge direction, by which an image is first partitioned into blocks and a direction predictor is then adaptively selected for each block with minimum prediction error and an efficient adaptive rice coder is then applied with residual image quantized.