Abstract
This paper proposes a novel robust image watermarking in which a logo watermark is embedded into the discrete multi-wavelet transform domain (DMWT) of an image. It is found that there are two characters in the low frequency band of the multi-wavelet domain. One is that the mean of corresponding coefficients in four subblocks is more stable than a single coefficient, and the other is that it is easily recognized whether a coefficient point is a smooth point or not by the difference between two corresponding coefficients in two subblocks. According to these unique characters, the watermark is embedded into the multiwavelet domain by quantizing the mean of corresponding coefficients in four subblocks. The quantization interval is decided by the character of the HVS based on the second character. Experimental results show that the propsed method is superior to the traditional wavelet-based quantization method.
This work is supported by the Guangdong Nature Science Foundation (No. 020199) and the Nature Science Foundation of Department of Education of Guangdong Province (No. Z02042).
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Zhang, J., Xiong, F. (2004). A Novel Watermarking for Image Security. In: Aykanat, C., Dayar, T., Körpeoğlu, İ. (eds) Computer and Information Sciences - ISCIS 2004. ISCIS 2004. Lecture Notes in Computer Science, vol 3280. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-30182-0_43
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DOI: https://doi.org/10.1007/978-3-540-30182-0_43
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