Research on wavelet based compression for image retrieval systems

The investigation on using the ZTE /modified SPIHT wavelet based compression algorithm for the image retrieval system is presented. As the ZTE/modified SPIHT algorithm codes an image into multi-layer bitstream, the base layer and enhancement layer bitstream, it provides superior benefits to the retrieval system compared to other compression methods. Since the base layer bitstream is analogous to a thumbnail image, it eliminates the redundancy of data. Moreover, the enhancement layer bitstream also allows fast transmission that enhances the performance of retrieval systems.