A geometric robust watermarking algorithm based on DWT-DCT and Zernike moments |
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Authors: | Yu Chen Fang Qu Jianbin Hu Zhong Chen |
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Institution: | (1) Key Laboratory of High Confidence Software Technologies of Ministry of Education, School of Electronics Engineering and Computer Science, Peking University, Beijing, 100871, China |
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Abstract: | This paper proposed a novel multibits watermarking algorithm providing robustness against geometric attacks. The robustness
is achieved from three aspects: ① Choosing the inscribed disk of the host image as the Zernike moments computation domain
and the square in the disk as the watermarking embedding domain. ② Embedding the watermark in the cascade discrete wavelet
transform-discrete cosine transform (DWT-DCT) domain by modulating the specified coefficient pair in each sub block. ③ Saving
two selected Zernike moments of the original watermarked image to estimate and correct the geometric attacks before watermark
extraction. Experimental results show that the proposed algorithm is robust to any angle of rotation attacks and wide range
of scaling attacks, and as well, a variety of other attacks such as lossy compression, common signal processing.
Biography: CHEN Yu(1983–), male, Ph.D. candidate, research direction: cryptography, information hiding, digital watermarking. |
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Keywords: | Zernike moments discrete wavelet transform-discrete cosine transform (DWT-DCT) watermarking |
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