Color image compression using FHCBC

This paper presents a new fractal color image compression method, called fractal hierarchical color block coding (FHCBC), which transforms the three color planes of a color image into a one component image by extracting correlation among them. It hierarchically divides the three color planes into homogeneous blocks, and for such block, the variance of pixels trichromatic coefficients is within a certain threshold value. Then, each block is represented by its mean value of the pixels, trichromatic coefficient ratios, and just a one component image is composed and compressed by fractal coding. In the decoding process, the reconstruction is carried out by a fractal decoding algorithm and the associated mean values of trichromatic coefficient ratios. In comparison .with the well known three-component separated fractal coding (SFC), the suggested method generate performance gains in running time, high compression ratio and equal level of reconstruction quality.