Robust wavelet-based color image watermarking using Pseudo Random Numbers

Information exchange over internet is increasing drastically day-by-day. Almost all multimedia information is in digital form. To protect the multimedia data from illegal manipulation and provide authenticity, techniques for copy right protection and content authentication of digital media is required. Digital watermarking is one of the techniques for protection and identification that hides authentic watermarks in multimedia data such as image, audio and video. This paper present watermarking of color images in wavelet domain that uses Pseudo Random Number (PRN) sequence generated from Elmann neural network to watermark the image. The neural network generated PRN sequence is a highly random sequence that provides high security. Experimental result shows that the proposed method achieves robustness and imperceptibility.