Modified CCSDS image data compression

Abstract

Consultative Committee for Space Data Systems (CCSDS) data compression consists of a two dimensional discrete wavelet transform of the image, followed by bit-plane coding of the transformed data. The algorithm can provide both lossless and lossy compression, and allows a user to directly control the compressed data volume or the fidelity with which the wavelet-transformed data can be reconstructed. The proposed algorithm yields better rate-distortion performance and has applications for near-earth and deep-space missions when compared to the standard recommendation. In the proposed method the Rice codes used in the CCSDS standard is replaced by subexponential coding which improves the rate-distortion performance and is robust against noise and outliers.