Title :
New predictive classified vector quantisation scheme for image compression
Author :
Lo, K.-T. ; Cham, W.-K.
Author_Institution :
Dept. of Electron. Eng., Hong Kong Polytech., Hung Hom
fDate :
8/4/1994 12:00:00 AM
Abstract :
A new image coding method using predictive classified vector quantisation (PCVQ) is proposed. The image is first divided into different subsources using a two-stage classification method based on the optimum three-level block truncation coding technique. Each subsource is then vector quantised using different codebooks. Simulation results show that an improvement of about 2 to 6 dB in PSNR performance over the JPEG scheme is obtained at the rate of 0.4375 bit/pixel
Keywords :
filtering and prediction theory; image coding; vector quantisation; image coding method; image compression; optimum three-level block truncation coding; predictive classified vector quantisation; two-stage classification method;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19940895
