Self-authentication of natural color images in Pascal Transform domain

This paper proposes a self-authentication scheme for color images, using a fragile data hiding method based on the Discrete Pascal Transform (DPT). The main contribution of this work is in the development of a scheme that is able to detect whether a color image has been tampered or not, to locate the exact tampered position, and to attempt to restore the original image content. This is achieved by embedding a low bit-depth scaled version of the image itself, resulting in very good stego image quality and satisfactory restoration.