A layered algorithm image coding based on combination of wavelet and ridgelet

This paper proposes a new layered image coding algorithm combined the advantages of wavelet and ridgelet transformations. First of all, the origin image I smoothed by an improved anisotropic diffusion method, obtained an smooth image R1, then subtracted R1 from I and obtained an texture image R2. R1 encoded by the SPIHT algorithm based on DWT, and R2 encoded by a amending SPIHT based on ridgelet. The experimental results show that this paper algorithm is better than the SPIHT compression algorithm in the case of the same rate, especially for rich texture image.