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Front. Inform. Technol. Electron. Eng.  2012, Vol. 13 Issue (8): 573-584    DOI: 10.1631/jzus.C1100338
    
A robust watermarking algorithm based on QR factorization and DCT using quantization index modulation technique
Hong-yuan Chen, Yue-sheng Zhu
Communication and Information Security Lab, Shenzhen Graduate School, Peking University, Shenzhen 518055, China
A robust watermarking algorithm based on QR factorization and DCT using quantization index modulation technique
Hong-yuan Chen, Yue-sheng Zhu
Communication and Information Security Lab, Shenzhen Graduate School, Peking University, Shenzhen 518055, China
 全文: PDF 
摘要： We propose a robust digital watermarking algorithm for copyright protection. A stable feature is obtained by utilizing QR factorization and discrete cosine transform (DCT) techniques, and a meaningful watermark image is embedded into an image by modifying the stable feature with a quantization index modulation (QIM) method. The combination of QR factorization, DCT, and QIM techniques guarantees the robustness of the algorithm. Furthermore, an embedding location selection method is exploited to select blocks with small modifications as the embedding locations. This can minimize the embedding distortion and greatly improve the imperceptibility of our scheme. Several standard images were tested and the experimental results were compared with those of other published schemes. The results demonstrate that our proposed scheme can achieve not only better imperceptibility, but also stronger robustness against common signal processing operations and lossy compressions, such as filtering, noise addition, scaling, sharpening, rotation, cropping, and JPEG/JPEG2000 compression.
关键词： Digital watermarking;  QR factorization;  Quantization index modulation (QIM);  Discrete cosine transform (DCT)    
Abstract: We propose a robust digital watermarking algorithm for copyright protection. A stable feature is obtained by utilizing QR factorization and discrete cosine transform (DCT) techniques, and a meaningful watermark image is embedded into an image by modifying the stable feature with a quantization index modulation (QIM) method. The combination of QR factorization, DCT, and QIM techniques guarantees the robustness of the algorithm. Furthermore, an embedding location selection method is exploited to select blocks with small modifications as the embedding locations. This can minimize the embedding distortion and greatly improve the imperceptibility of our scheme. Several standard images were tested and the experimental results were compared with those of other published schemes. The results demonstrate that our proposed scheme can achieve not only better imperceptibility, but also stronger robustness against common signal processing operations and lossy compressions, such as filtering, noise addition, scaling, sharpening, rotation, cropping, and JPEG/JPEG2000 compression.
Key words: Digital watermarking    QR factorization    Quantization index modulation (QIM)    Discrete cosine transform (DCT)
收稿日期: 2011-11-16 出版日期: 2012-08-02
CLC:  TP309.2  
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Hong-yuan Chen
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Hong-yuan Chen, Yue-sheng Zhu. A robust watermarking algorithm based on QR factorization and DCT using quantization index modulation technique. Front. Inform. Technol. Electron. Eng., 2012, 13(8): 573-584.

链接本文:

http://www.zjujournals.com/xueshu/fitee/CN/10.1631/jzus.C1100338    或    http://www.zjujournals.com/xueshu/fitee/CN/Y2012/V13/I8/573

[1] Song-bin Li, Huai-zhou Tao, Yong-feng Huang. Detection of quantization index modulation steganography in G.723.1 bit stream based on quantization index sequence analysis[J]. Front. Inform. Technol. Electron. Eng., 2012, 13(8): 624-634.