Perceptual coding of digital images

A novel perceptual image coder of grey level images is presented. This coder is an improved version of the coder by Tan et al with better optimised parameters featuring a local contrast sensitivity function, intra-frequency masking and inter-orientation masking functions for perceptual error modelling. The architecture of the proposed coder follows that of the state-of-the-art EBCOT by Taubman and adopted by the JPEG2000 standard as the core coding structure. The overall perceptual performance improvement of the proposed coder is noticeable compared with the EBCOT coder with the MSE and CVIS error measures.