Digital watermarking algorithm based on block singular value decomposition and BP network

Digital watermarking is deemed as a novel technique for copyright protection of digital products. A new digital image watermarking based on block singular value decomposition (SVD) and BP network because of their excellence is proposed. The singular values of each image sub-block are gained to form a vector by applying the SVD procedure. Then the singular value of embedded sub-block is amended, BP network built is applied to the embedment and extraction of watermarking. The algorithm recovers the watermark without any reference to the original image. Experimental results show that the new watermarking method performs well in both imperceptibility and robustness for image processing and attack, especially for geometric distortion.