title: L(infinity) constrained high-fidelity image compression via adaptive context modeling.
abstract: In this paper, we study high-fidelity image compression with a given tight L(infinity) bound. We propose some practical adaptive context modeling techniques to correct prediction biases caused by quantizing prediction residues, a problem common to the existing DPCM-type predictive near-lossless image coders. By incorporating the proposed techniques into the near-lossless version of CALIC that is considered by many as the state-of-the-art algorithm, we were able to increase its PSNR by 1 dB or more and/or reduce its bit rate by 10% or more, more encouragingly, at bit rates around 1.25 bpp or higher, our method obtained competitive PSNR results against the best L(2)-based wavelet coders, while obtaining much smaller L(infinity) bound.
authors.affiliation: Dept. of Comput. Sci., Univ. of Western Ontario, London, Ont., Canada. wu@csd.uwo.ca
authors.forename: X
authors.initials: X
authors.lastname: Wu
authors.forename: P
authors.initials: P
authors.lastname: Bao