An efficient ROI based copyright protection scheme for digital images with SVD and orthogonal polynomials transformation

In this paper, an efficient copyright protection scheme, based on Region of Interest (ROI), Singular Value Decomposition (SVD) and Orthogonal Polynomials Transformation (OPT) is proposed. Initially, the proposed copyright protection scheme separates the edge blocks with maximizing signal-to-noise ratio in orthogonal polynomials domain and arranges them in descending order. Next, the host image is transformed into OPT domain and DC coefficients are selected to form the OPT-DC map and ROIs are selected in the map with secret image. Then, Singular Value Decomposition (SVD) is applied on the selected ROIs to construct master share and finally ownership share is generated from master share with secret image. Extensive experiment and analysis have been conducted to demonstrate the robustness of the proposed scheme against various image-manipulation attacks.