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New predictive classified vector quantisation scheme for image compression

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2 Author(s)
Lo, K.-T. ; Dept. of Electron. Eng., Hong Kong Polytech., Hung Hom ; Cham, W.-K.

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

Published in:

Electronics Letters  (Volume:30 ,  Issue: 16 )