Digital Watermarking using Least Significant Bit Insertion Method

In this paper a new non-blind LSB (Least Significant Bit) based gray scale image watermarking technique is used. This new algorithm is used LSB , by inserting the binary values of the watermark and shifting the watermark according to the higher or lower bits of pixel coordinates of the image before embedding the watermark. Here the cover image is of size 128x128 and the watermark size is 32x32.The embedding and Extraction algorithm is applied to each bit inserted images separately. After the embedding, the watermarked images are tested against some attacks. The proposed technique is expected to show a great ability to preserve the watermark against these attacks. The watermark quality can be measured by calculating the MSE, PSNR, SSIM values. For a good embedding the PSNR value should be high and the SSIM should be also higher. SSIM values are between [1,0]. Using this technique, good watermark embedding can be achieved; also it shows high imperceptibility and robustness of the embedded watermark.