An RST-resilient image copyright protection scheme based on the invariant domain and image secret sharing

This paper proposes a novel scheme that can protect the copyrights of images based on the RST-invariant domain and Image Secret Sharing (ISS) scheme. The proposed scheme aims at resisting the rotation, scaling, and translation (RST) of the geometric distortions. The scheme first extracts the features from the RST-invariant domain of the host image. It then utilizes the ISS scheme to encode a binary logo according to the extracted features. Finally, it generates an image for authentication, which can later be used to reconstruct the logo for copyright verification when disputes over the image ownership occur. The experimental results show that the proposed scheme can achieve a satisfactory accuracy rate for images suffering RST distortions.