Robust Watermarking Scheme Against Multiple Attacks

A good watermarking technique helps in protecting the copy right of the image which is the motivational factor in developing new encryption techniques .The present paper found a novel fact that by inserting the watermark using Least Significant Bit (LSB into three components of the image namely RED GREEN and BLUE. The watermark is a binary image ,embedded into host image by altering LSB values of the selected regions. In this only 10 cases are considered for performing OR and AND operations on extracted watermark, only that watermark will be selected based on highest NC value of extracted watermarks. In order to evaluate the performance of proposed algorithm, MSE (Mean Square Error), RMSE (Root MSE), PSNR (Peak Signal Noise ratio) parameters are used. The proposed scheme is found robust against various geometric attacks like cropping, Rotation and salt & pepper noise.