Digital image watermarking scheme based on quantization index modulation

Duanquan Xu; Guangxi Zhu

doi:10.1117/12.750077

14 November 2007 Digital image watermarking scheme based on quantization index modulation

Duanquan Xu, Guangxi Zhu

Proceedings Volume 6790, MIPPR 2007: Remote Sensing and GIS Data Processing and Applications; and Innovative Multispectral Technology and Applications; 67904W (2007) https://doi.org/10.1117/12.750077
Event: International Symposium on Multispectral Image Processing and Pattern Recognition, 2007, Wuhan, China

Abstract

Quantization index modulation is a well-known method used for blind watermarking system. In this paper, a novel QIM watermarking scheme is proposed which is based on the difference of neighboring blocks' DCT coefficients. To implement the algorithm, pixels' permutation is performed to the two neighboring blocks to restrict the difference of their corresponding DCT coefficients to a small range. Then, bits of watermark are embedded into the image by modulating the difference to position or negative value. In order to keep the balance between invisibility and robustness, embedding strength is adjusted adaptively for each embedding position according to the texture masking feature of HVS, which improves the performance of the scheme.

Citation Download Citation

Duanquan Xu and Guangxi Zhu "Digital image watermarking scheme based on quantization index modulation", Proc. SPIE 6790, MIPPR 2007: Remote Sensing and GIS Data Processing and Applications; and Innovative Multispectral Technology and Applications, 67904W (14 November 2007); https://doi.org/10.1117/12.750077

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KEYWORDS

Digital watermarking

Modulation

Image quality

Digital imaging

Image filtering

Image processing

Quantization

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