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《Infrared and Laser Engineering》 2013-S2
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Digital watermarking method for QR code images based on DCT and SVD

Liu Li;Zhou Yajian;Zhang Bin;Yuan Kaiguo;Ding Haiyang;Guo Yucui;Information Security Center,Beijing University of Posts and Telecommunications;China Information Security Product Evaluation Authentication Center;Computer college,Beijing University of Posts and Telecommunications;Science College,Beijing University of Posts and Telecommunications;  
The proposes a new robust digital watermarking method for Quick Response(QR) code images, which was based on Discrete Cosine Transformation(DCT) and singular value decomposition(SVD). The new method fully takes advantage of the high-capacity property and a good error-correction ability of QR code. Firstly, position detection was performed to extract pattern positions and separators in a given QR image and then fuzzify the image with Gaussian noise to form a carrier image. At the meanwhile, the watermarking image was scrambled with Arnold transform. Next, transformation with DCT were done on the basis of 8′ 8 blocks and whose DC coefficients were put together to form a matrix A with a dimension of 64′64. Finally, watermarking image can be embedded in singular values of matrix A after applying SVD to it. Experimental results show that the algorithm was robust in resisting attacks such as Gaussian noise, salt pepper noise, speckle noise and median filter without affecting the correct identification of QR code.
【Fund】: 国家自然科学基金(61003284);; 新闻出版重大科技工程项目“数字版权保护术研发工程”(GXTC-CZ-1015004/09);; 北京市自然科学基金(4122053);; 北京市教育委员会科技计划(KM201210015006);; 中央高校基本科研业务费专项资金(BUPT2012RC0217)
【CateGory Index】: TP309.7
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