A Hybrid Model of Watermarking Scheme for Color Image Authentication Using Discrete Wavelet Transform and Singular Value Decomposition
Sukanta Kumar Tulo, Nalinikanta Barpanda, Subhrajit Pradhan, A. Amiya, Kumar Gupta · 2016
Digital Watermarking is a process of embedding information in the multimedia content (host or cover image) for image authentication. An ideal watermarking system would embed an amount of information that could not be removed or altered without making the cover object entirely unusable. Over the past few years digital watermarking has become popular due to its significance in content authentication and legal ownership for digital multimedia data. A digital watermark is a sequence of information containing the owner's copyright. It is inserted invisibly in another image so that it can be extracted at later times for the evidence of rightful ownership. Available digital watermarking techniques can be categorized into one of the two domains, viz., spatial and transform, according to the embedding domain of the host image. Based on these domains digital watermarking can be done by FFT, DCT, DWT, SVD. The analysis proves that the proposed DWT-SVD hybrid model is much more superior to other models as it is found to be more robust and effective. The results revealed