A Fractal Based Image Watermarking for Authentication and Verification

In this paper, a new watermarking technique is presented which satisfies both verification and authentication purposes simultaneously by embedding a binary watermark into the image. The proposed method uses a special type of fractal block coding; its parameters are contrast scaling and the mean of range block. It also utilizes the fuzzy C-mean clustering to specify the watermark bits. Our experiments measured the fragility and robustness of the method to signal distortions such as JPEG compression, median filter, and additive noise. The experimental results showed that the proposed method has provided a sensitive verification and a reliable authentication.