a new fast robust color image watermarking method using FPCA clustering

there is a genrally -accepted tendency to consider and process color images as a set of parallel gray -scale planes insteadof an ensemble of a 3-D realization. Although even now many researchers make the same assumption but it is proved that using vector geometries leads to more promising results in this paper by processing the color images as vector geometries a novel method is proposed to decompose a natural image into three eigenimages. based on the proposed eigenimage extraction method a new color image watermarking method is proposed