Method for the estimation and recovering from general affine transforms in digital watermarking applications

@inproceedings{Deguillaume2002MethodFT,
  title={Method for the estimation and recovering from general affine transforms in digital watermarking applications},
  author={Fr{\'e}d{\'e}ric Deguillaume and Sviatoslav Voloshynovskiy and Thierry Pun},
  booktitle={Security and Watermarking of Multimedia Contents},
  year={2002}
}
An important problem constraining the practical exploitation of robust watermarking technologies is the low robustness of the existing algorithms against geometrical distortions such as rotation, scaling, cropping, translation, change of aspect ratio and shearing. All these attacks can be uniquely described by general affine transforms. In this work, we propose a robust estimation method using apriori known regularity of a set of points. These points can be typically local maxima, or peaks… CONTINUE READING
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