An image watermarking using fractal parameters

In this paper we propose a new fractal watermarking method using a secret key extracted from original image contents without inserting an watermark, and the fractal parameters of the watermark image are transformed by the secret key extracted from original image. We use the image watermark as the owner photograph of the image contents. Thus, our algorithm has no original image distortion by watermarking because of decoding the transformed fractal parameters of the watermark by the secret key extracted from original image.