Digital image compression using graph coloring quantization based on wavelet-SVD

Abstract

JPEG2000 is an example of standard of compression technique. Wavelet and scalar quantization are used in the JPEG2000 compression scheme. Despite the advantages of JPEG2000 based on wavelet has low computation, the wavelet has poor performance in low-correlated image. In this paper, we propose a graph coloring technique in the quantization process on image compression scheme based on Wavelet- Singular Value Decomposition. We show that the system provides good performance based on compression ratio and PSNR. The average compression ratio generated by the system stands between 50-60%, while the average PSNR stands between 40-80 dB. © IOP Publishing Ltd 2013.