Fast fractal image coding based on gray difference
Shi Yue-xiang · Jisuanji gongcheng yu sheji · 2009
According to self-similarity of the image,fractal image coding can get very high compression ratio based on the iteration function system theory.However,the long coding time limits its application.An improved coding algorithm based on gray difference taxis with the same theory is presented.By comparing the gray difference of range block and domain block,the gray difference range could be fixed,which thereby speed up the process of searching for the best domain block by range block.The result of experiments shows that this method reduce the coding time a lot while maintaining good image coding quality and a high compression ratio.