PSNR-BASED OPTIMIZATION OF JPEG BASELINE COMPRESSION ON COLOR IMAGES

A fast rate-distortion analytical framework for the PSNR-based optimization of JPEG baseline compression on color images is proposed in this paper. The analysis is conducted in the luminance-chrominance color space and based upon the ȡ-domain analysis method [1]. The simulation results show that the proposed scheme can dramatically improve the performance of the JPEG baseline compression on color images in terms of peak signal-to-noise ratio (PSNR). Meanwhile, while the complexity of the proposed scheme is kept low, its results are very close to that from exhaustive searching method. Index Terms—Image coding, quantization, rate distortion theory 1