Region Adaptive Robust Watermarking Scheme Based on Homogeneity Analysis
Priyanka Singh and Suneeta Agarwal
Motilal Nehru National Institute of Technology, India
Abstract: To counter the security breaches, came the need of watermarking which is one of the efficient methods to maintain the integrity of the digital content and prove the rightful ownership. Region adaptive watermarking is the technique which is based on the content of the image which is required to be protected against the various possible attacks. Homogeneity analysis of the image has been made using the quad tree based image segmentation method to chalk out the appropriate sites for embedding the secret information. The information is itself extracted from the image in terms of a feature which is hidden using the Singular Value Decomposition (SVD) properties in the cover image. The robustness of the proposed algorithm against the various attacks has been validated by attaining high Peak to Signal Noise Ratio (PSNR) and Normalized Cross Correlation (NCC) values in the experiments carried out.
Keywords: Homogeneity analysis, NCC, PSNR, quad tree, region adaptive watermarking, SVD.
Received January 16, 2013; accepted August 29, 2013