A new wavelet fractal image coding algorithm
YU Bian-zhan · Tv Engineering · 2003
A new hybrid Wavelet-fractal image coding algorithm is presented in this paper.On one hand,the paper pro-poses a novel smooth,symmetric biorthogonal wavelet based selection algorithm by optimization of discrete finite variation(DFV)to get rid of the blocking effect in the resulting image.On the other hand,in order to improve reconstructed image quality,an adaptive wavelet sub-tree partition algorithm is given which can split the wavelet subtree into children subtrees according to local image complexity.Experimental results show that the new algorithm provides much better coding perfor-mance.When the compression ratio is the same ,PSNR and subjective visual quality of this algorithm are better than those of basic fractal compression,SQS and SPHIT compression algorithms.