Digital Watermarking Algorithm Based on NSCT and DFRFT
HU Shaoha · Video Engineering · 2015
In order to overcome the external destructive attacks on digital watermarking effectively and enhance therobustness of digital watermarking, a digital watermarking algorithm based on Nonsample Contourlet Transform(NSCT) and Discrete Fractional Fourier Transform(DFRFT) is proposed in this paper. The watermark image isprocessed by Logistic scrambling to enhance the security of the digital watermarking. Then the low-frequency sub-band which is calculated by NSCT decomposition and DFRFT domain is used to embed the scrambling watermarkinto the original image. The experimental results show that this algorithm not only has good robustness,but also caneffectively resist the external attack.