Novel robust blind image watermarking method based on correlation detector

In this paper, we propose a robust blind watermarking method based on correlation detector. A random binary watermark is generated by a secret key and bit-wisely embedded into one sub-band of the DWT domain of the image. A correlation based detector which does not need an original image is used to determine whether a watermark exists or not in an image. Experimental results show that the proposed scheme is robust to most common attacks, especially for JPEG compression and noise addition.