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Directionally classified image vector quantisation using Walsh Hadamard subspace distortion

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2 Author(s)
L. M. Po ; Dept. of Electron. Eng., City Polytech. of Hong Kong, Kowloon Tong, Hong Kong ; C. K. Chan

A novel directionally classified subspace image vector quantisation coding scheme using a new gradient based edge classifier and Walsh Hadamard transform subspace distortion measures is proposed. The new coding scheme can reduce both the computational complexity and memory requirement of the conventional classified vector quantisation technique while the reproduced image quality is maintained.

Published in:

Electronics Letters  (Volume:27 ,  Issue: 21 )