Coefficient Partitioning Scanning Order Wavelet Packet Algorithm for Satellite Images

摘要

A new embedded wavelet packet image coder algorithm is proposed for an effective image coder using correlation between partitioned coefficients. The new algorithm presents parent-child relationship for reducing image reconstruction error using a coefficient partitioning scanning order (CPSO). It is shown that the new algorithm achieves low bit rates and rate-distortion. It also demonstrates higher PSNR under the same bit rate. These results show that the encoding and decoding processes of the proposed coder are more accurate than SPIHT for texture images that include many high-frequency elements such as satellite photograph images. The experimental results imply the possibility that the proposed method can be applied to on-line image processing which require smaller file size and better resolution.