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A New Technique for Digital Image Watermarking

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Abstract

In this paper, a new technique is proposed for rotation, scaling and translation (RST) invariant image watermarking based on log-polar mappings (LPM) and phase-only filtering (POF). The watermark is embedded in the LPM of Fourier magnitude spectrum of the original image, and a small portion of resulting LPM spectrum is used to calculate the watermark positions. This technique avoids computing inverse log-polar mapping (ILPM) to preserve the quality of the watermarked image, and avoids exhaustive search to save computation time and reduce false detection. Experimental results demonstrate that the digital watermarking technique is invariant and robust to rotation, scaling, and translation transformation.

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Authors and Affiliations

  1. Information Engineering Department, Guangdong Economics and Management College, Guangzhou, 510400, P.R. China

    Xiang-Sheng Wu

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  1. Xiang-Sheng Wu
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Correspondence to Xiang-Sheng Wu.

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Supported by the China Scholarship Council (Grant No.2001-3048).

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Wu, XS. A New Technique for Digital Image Watermarking. J Comput Sci Technol 20, 843–848 (2005). https://doi.org/10.1007/s11390-005-0843-1

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  • DOI: https://doi.org/10.1007/s11390-005-0843-1

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