Perceptually based subband AMBTC image coder

In this paper, we incorporate the Weber´s law into the framework of subband absolute moment block truncation coding (SAMBTC) together with an effective bit-rate control scheme to greatly improve image quality at or around the same bit rates. Or, alternatively it reduces the bit rates further without incurring more noticeable degradation beyond what the SAMBTC has yielded. Experimental results show that the proposed perceptually based SAMBTC distinctly outperforms SAMBTC coded at very low bit rates