Rotation,scaling and translation(RST)attacks can desynchronize watermark detection,which causes failure in many watermarking systems.In this paper,an image adaptive RST invariant watermark(AWPZM)is proposed by using t...Rotation,scaling and translation(RST)attacks can desynchronize watermark detection,which causes failure in many watermarking systems.In this paper,an image adaptive RST invariant watermark(AWPZM)is proposed by using the rotation invariant property of pseudo-Zernike moments(PZM)and odd-even quantization.PZM of the original image is computed first,and then those suitable for watermark generation are selected.Then,magnitudes of them are odd-even quantized to generate the watermark.In detection,a normalized hamming function is employed to determine the similarity of the watermark.Experimental results show its robustness to rotation and scaling.For traditional attacks,such as JPEG compression,added noise and filtering,the similarities are all above 0.95.展开更多
基金This work was supported by the National Natural Science Foundation of China(Grant No.60572152)the Ph.D.Programs Foundation of the Ministry of Education of China(No.20060701004).
文摘Rotation,scaling and translation(RST)attacks can desynchronize watermark detection,which causes failure in many watermarking systems.In this paper,an image adaptive RST invariant watermark(AWPZM)is proposed by using the rotation invariant property of pseudo-Zernike moments(PZM)and odd-even quantization.PZM of the original image is computed first,and then those suitable for watermark generation are selected.Then,magnitudes of them are odd-even quantized to generate the watermark.In detection,a normalized hamming function is employed to determine the similarity of the watermark.Experimental results show its robustness to rotation and scaling.For traditional attacks,such as JPEG compression,added noise and filtering,the similarities are all above 0.95.
