Description

ABSTRACT

                    Here we propose the technique for embedding the images to secure the watermarking.  For embedding the images Spread Spectrum algorithm is used.  Signals are spread with different codes so that they can be separated at the receivers. Signals can be spread in the frequency domain or in the time domain. For extracting signals, we decompose the images by the wavelet. It will extract the low and high frequency. Extracted frequency is embedded with the cover images. And Finally we calculate the PSNR and MSE values for Analyzing the quality of images.

             The popularity of Internet access has enabled the wide spread of digital multimedia contents in the form of image, video and audio; however, it also makes unauthorized copying and distribution easier. Researchers from both the industry and the academy have been trying to address this dilemma by watermarking techniques. Watermarking, as a prospective weapon against piracy, embeds ownership information into the host contents without degrading the perceptual quality of the host contents. The embedder and the detector (or decoder) are the two most important components of the digital watermarking systems. Thus in this work, we discuss how to design a better embedder and detector (or decoder). Spread spectrum (SS) and quantization techniques are the two most appealing embedding techniques in the literature.