Research of image bind watermarking based on DWT-SVD
Tao Feng · 2009
In this paper, a new watermarking algorithm based on discrete wavelet transform (DWT) of image and singular value decomposition (SVD) is presented. After decomposing the original image into four bands, the SVD is applied to the blocks of the low sub-band. To improve the security the watermark is scrambled by Arnold transform, and then is embedded into the largest singular value of every block. The watermark can be extracted without original image, among which a person who does not know the secret key cannot correctly retrieve the watermark. Experimental results indicate that the performance of the proposed watermarking algorithm is invisible, robust and secure.