Image Watermarking Using Adaptive Quantization and Singular Value Decomposition

Nowadays, we all have seen that use of internet has become very important to all the generations. So, large amount of data has been shared through internet. So, important information that has been travelling through internet can be copied by an unauthorized user. To avoid this type of problem Digital Watermarking Technique has been used. In this paper watermarked image has been developed using Adaptive Quantization and Singular Value Decomposition Technique (SVD). In this quantization step has been used and after that PSNR value is calculated and compare with the PSNR values of watermarked image designed by using Singular Value Decomposition technique. Keyword – SVD, DWT, PSNR, Adaptive Quantization, Quantization Step.