ABSTRACT

Digital Watermarking is not a new name in the technology world but there are many new issues arise related with watermark. This paper surveys recent advances in watermarking techniques in digital images. The aim of digital watermarking is hidden information added into content of multimedia. In this paper, DCT technique is used and when size of image is increase then also increases PSNR without decreasing power of embedded factor[1] (alpha factor) in same format.