Incorporation of Digital Watermarking through Embedding one Image within another Image

In this paper, we have proposed an efficient watermarking algorithm for copyright protection of digital images. This algorithm is able to embed or hide digital image such as company's logo or trademarks into original image. We have altered all of the R, G and B values of the image which is taken as signature data, to an array of data bits. Then the data bits are encrypted to unlike pixel positions on the host image depending on key value and image size. As a result, we get a watermarked image. After that we have formed three different image shares using any two components of R, G and B of entire watermarked image. The key is also divided into three different logical blocks by digits. By combining any two blocks of key we have formed key shares and have assigned to image shares. Out of those three shares, only addition of any two is able to make the full image or key. At the decryption end, through appropriate arrangement of shares of key and image, make possible to retrieve hidden data bits from watermarked image and reform into its original content.