Fuzzy adaptive color image watermarking algorithm

A fuzzy adaptive watermarking algorithm of color image based on discrete cosine transform(DCT)domain was proposed.By adopting YUV color space and considering the properties of the original image,a fuzzy controller was designed,and reasonable rules of fuzzy controller were established based on human visual system(HVS).The different strength of watermarks were embedded into the DCT coefficients of the luminance Y,the hue U and the saturation V of the color image.It achieved the watermark adapting to the image itself entirely and the dynamic control of the strength of embedded watermarks.The experimental results show that the proposed watermarking algorithm is invisible and robust against various signal processing such as cropping,filtering,noise.