Robust embedding of improved arnold transformed watermark in digital images using RDWT — SVD

摘要

Digital image Watermarking gives an efficient method for copyright protection. In this paper a robust and secure algorithm of watermarking based on Redundant Discrete wavelet transform (RDWT), Singular value decomposition (SVD) and Improve Arnold transform is presented. The watermark image is scrambled by Improved Arnold transform to boost up its confidentiality and robustness. In the proposed scheme, after applying RDWT and SVD to each sub-band of the gray scale host image, we modify the singular values of the host image by embedding the gray scale scrambled watermark image. This presented method is more imperceptible and has an extensive capacity due to SVD and RDWT. The advantage of the given method is that it is highly robust against various image processing attacks. Analysis and experimental results demonstrate that the proposed scheme performs better in comparison previously introduced RDWT-SVD based method.