A novel image coding algorithm using ant colony system vector quantization
Nasir Rajpoot, Arshad Hussain, Usman Ali, Kashif Saleem, M. Hamza Qureshi · Warwick Research Archive Portal (University of Warwick) · 2004
Ant colony system (ACS) is a combinatorial optimization method motivated by the behaviour of real ants. In this paper, we present a novel image coding method based on ACS vector quantization of groups of wavelet coefficients. The generation of codebook using ACS is facilitated by representing the coefficient vectors in a bidirectional graph, followed by defining a suitable mechanism of depositing pheromone on the edges of graph. Experimental results show that the quantization of zerotree vectors using ACS outperforms, in most cases, its traditionally used Linde-Buzo-Gray (LBG) counterpart.