Watermark detection for noisy interpolated images |
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Authors: | Giannoula A. Boulgouris N.V. Hatzinakos D. Plataniotis K.N. |
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Affiliation: | Electr. & Comput. Eng. Dept., Univ. of Toronto, Ont., Canada; |
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Abstract: | In this brief, the case where the watermark is detected in a noisy interpolated version of the originally watermarked image is investigated. Polyphase decomposition is utilized at the detection side in order to enable the flexible formation of a fused image, which is appropriate for watermark detection. The optimal fused correlator, obtained by combining information from different image components, is derived through a statistical analysis of the correlation detector properties, followed by Lagrange optimization. It is shown that it is preferable to perform detection in a fused image rather than the original image. |
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