Color Image Coding by Utilizing the Crossed Masking
Yan Jing Meng, Linfeng Guo · 2006
A color image coding scheme, that takes advantage of the chrominance-on-luminance masking effect, is proposed in this paper. This coding scheme exploits the remarkable crossed masking effect, such that more distortion in luminance will be hidden in the places where the chrominance components are strong. First, the asymmetrical crossed masking effects are introduced. Next, proper evaluation of the luminance just-noticeable-difference (JND) threshold lifting due to the chrominance masking is investigated. Based upon that, the crossed masking effect is utilized to achieve extra gain on color image compression under the dyadic wavelet transform (DWT) centric image coding framework without compromise of viewing quality. Meanwhile, no overhead of side information is invoked in the proposed scheme.