A Fractal Image Coding Method Based On A Changeable Threshold And Revised Creative Function

Fractal image compression coding(FICC) is a new image coding method developed in recent years and has been studied extensively. Based on the analyze of conventional fractal coding and decoding , a fractal image coding algorithm based on changeable threshold and creative function is proposed in this paper. New algorithm is to be in accordance with the feature of human visual system. The revised creative function can get a higher performance compared to the conventional creative function. The proposed algorithm is combined with adaptive quadtree partition to obtain higher compression ratio and best image quality.Conclusion r1 represent pixel-value of original image range block,r represent mean-value of original image range block, d represent mean-value of original image domain block, d1 represent pixel-value of resumptive image domain block, d represent mean-value of resumptive image domain block. Superior Perfermance of resumptive image range block is obtained as compared to conventional creative function by one iteration ,that is,...