A New Image Coding Algorithm Based on DWT and Contourlet
低比特率混合域图像压缩编码算法研究

In this paper,a new image coding algorithm based on DWT and Coutourlet is proposed.Firstly,the wavelet transform is applied to the original image,and the directional filter banks(DFB) are employed to middle and high frequency subbands;Then,the lowest frequency coefficients are optimized according to the wavelet coefficients statistical properties;Thirdly,the new extended spatial orientation tree are constructed;Finally,the encoding scheme is realized by the idea of SPIHT.The experimental results show that the presented image compression scheme performs better than that of the state-of-art image coders(SPIHT,WBCT),especially for low bit-rate and texture image.