17-3 JPEGのビットストリームに可逆変換可能な画像符号化方式の主観画質改善(第17部門画像符号化2)

抄録

We previously proposed a new type of lossy image coding scheme whose compressed data can be losslessly converted into JPEG bitstreams. In this paper, perceptual image quality of our coding scheme is improved by taking account of spatial frequency characteristics of the human visual system. Results of our subjective quality assessment test demonstrate that perceptual quality of the reconstructed images is certainly improved.