Image Compression Based On Wavelet Transform And Vector Quantization

Image compression is the main content of digital image processing technology,and it is vital to image storage and transmission. Wavelet transform and vector quantization both are important tools of modern image coding.Because vector quantization can turn wavelet coefficients efficiently into bit stream to realize image compression,it can bring innovation and vital force to this field.In this paper, the conventional methods of image compression,wavelet analysis,vector quantization, wavelet transform coding and the use of WT/VQ system in image compression are analysed and summarized detailedly.My own work are as follows. First, the common used quantization and coding methods are simulated;Second,a new image progressive transmission method based on MSVQ,is put forward.And simulation shows that it can reduce the computations and memory space,and quicken the transmission speed;Third,a novel image compressive method,based on wavelet transform and vector quantization,is given.And simulation shows that it can compress images efficiently under high compression ratio.