Fast attractor image coding method based on wavelet transform

The natural image is not strongly alike,the direct compression is ineffective and compress speed is slow,when decomposed with wavelet transform,it is divided into a number of sub-images of different frequency bands,and of different spatial orientations.The neighboring sub-images of the same orientation are strongly alike.The sub-images of different orientations,though few similarities were presented between them.Because the fractal dimension basically reflect a complications for variety of the image grey scale,so fractal dimension was used to evaluate the matching degree of similar image block.It's obtained an additional increase in compression ratio and reduced the code time.