An Improved On-Board Post-Transform Image Compression Algorithm

摘要

The shortcomings of sparse representation of remote sensing images and the on-board post -transform-based image compression algorithm are analyzed. In this paper, an improved post-transform based compression algorithm is proposed. The algorithm is improved in terms of computational complexity, optimal post-transform basis selection and post-transform entropy coding algorithm. Experimental results show that the improved compression algorithm has higher compression performance, compared with the traditional compression algorithm, the SNR is improved 0.3-1.1dB. Which effectively solves the problem of sparse representation of wavelet transform and low efficiency of post-transform. And suitable for on-board CCD camera applications.