A Review on Digital Image Watermarking
Jobenjit Singh Chahal, Shivani Khurana · 2013
In the recent few years, it has become a daily need to distribute digital images as a part of widespread multimedia technology by means of the World Wide Web. Digital Image Watermarking techniques have been developed to protect digital images from illegal modifications and illegal reproductions. So these techniques has developed widely to maintain the broadcasting media and content authentication, broadcast monitoring, tamper detection, copyright protection, and many other applications. This paper highlights the basic model of Digital Image Watermarking, its applications and its attributes. Moreover, it reviews some of the techniques used in Digital Image Watermarking. In addition, various possible attacks on watermarked images are discussed. To check the Imperceptibility and Robustness, Peak Signal Noise Ratio (PSNR) and Normalized Cross-Correlation (NCC) parameters are being used. Keywords—Watermarking, Tamper detection, Copyright protection, Imperceptibility, PSNR, NCC.