Digital Image Watermarking based onSine Hyperbolic Transformation

In this paper, Sine Hyperbolic transformation based image watermarking scheme has been proposed. Multiple watermark images are considered for embedding process. Watermarked image is more vulnerable to security attacks such as noise interference, geometrical attacks and LSB neutralization attack. In the proposed algorithm, watermarks are embedded into host at various positions. The recovered watermarks are compared among themselves with respect to each pixels to get resultant watermark. Due to this, any modifications in pixel values of watermark image will be retrieved from other similar watermarks after de-watermarking process and hence provides better results against security attacks.From the security analysis, better results are obtained for the proposed algorithm compared to other existing techniques. The algorithm utilizes less execution time compared to other existing methods.