Secure Mosaic Images by Nearly Reversible Color Transformations

Transmission is a major aspect in today’s world. A secret image looks like a selected targeted image will be transmitted for the security reasons. In this project secure image transmission technique is proposed, which transforms automatically a given large volume secret image into a so-called secret-fragment-visible mosaic image of the same size. The mosaic image looks like same as the target image and may be used as a camouflage of the secret image, is yielded by dividing the secret image into fragments and transforming their color characteristics to be those of the corresponding blocks of the target image. Skillful techniques are designed to conduct the color transformation process so that the secret image may be recovered nearly losslessly. The information required for recovering the secret image is embedded into the created mosaic image by a lossless data hiding scheme using a key. Good experimental results show the feasibility of the transforming image.