Literature Review on Digital Image Watermarking
Chargarlamudi Baby Rani, B.V.N. Praveena, K. Ramanjaneyulu · 2015
Digital image watermarking is the technology that is used in information security applications like digital image content protection and copyright protection. In this paper, a brief review of literature on digital image watermarking is presented. Watermarking algorithms can be classified based on different criterions. Depending upon the specific application, watermarking algorithm should satisfy certain requirements. Important parameters used to measure the quality of watermarking are Peak Signal to Noise Ratio (PSNR) and Normalized Cross Correlation (NCC). PSNR represents visual quality of the watermarked image. NCC indicates the visual quality of extracted watermark. For comparing the performance of different watermarking algorithms, PSNR and NCC values against various attacks are measured.