Secure Image Transmission Technique through Secret-Fragment-Visible Mosaic Image

Abstract

— A new secure image transmission technique is proposed, which changes naturally a given huge volume secret image into a secret-fragment-visible image called mosaic image of the same size. The mosaic image, which appears to be like an discretionarily chose target image and may be utilized as a disguise of the secret image, is yielded by separating the secret image into sections and changing their shading attributes to be those of the comparing pieces of the target image. Skillful techniques are intended to lead the shading change process so that secret image may be recuperated almost losslessly. A scheme of handling overflows/underflows in the changed over pixels shading values by recording the shading contrast in the untransformed shading space is additionally proposed. The data needed for recuperating the secret image is embedded into the created mosaic image by a lossless information concealing plan using a key. Good experimental results demonstrate the achievability of the proposed method.