Video Watermarking Scheme Based on Normalization of Pseudo-Zernike Moment

Present an anti-geometric attacks video watermarking scheme based on normalization of pseudo-Zernike moment. Employing the RST invariant property of improved Pseudo-Zernike moment magnitudes, the watermark image is embedded into the centre circle area of I frame in the spatial domain after reconstruction. Because of much high similarity between video frames, an optimal moment set is selected on the basis of I frame and the adjacent P frame. In detection, the improved Pseudo-Zernike moments of the possibly attacked I frame are computed first and the ones of I frame are substituted by that of the adjacent P frame selected in the optimal moment set as the key to extract watermark. Experimental results show this scheme can get good quality images, improve the algorithm´s dependence on original data, and makes the watermark more robustness to geometric attacks, especially for scale attacks.