We present an approach for embedding a digital watermark into an image using the fast Fourier transform. To this watermark is added a template in the Fourier ...

following fast algorithms for the recovery of the tem- plate using log-polar maps and log-log maps which can respectively recover rotation and scale changes or.

These techniques broadly seek to generate three different types of watermarks: fragile [11,4], robust [8, 34, 5,41,54,33] and semi-fragile [25,43,49] watermarks ...

We detail a new algorithm based on the log-polar or log-log maps for the accurate and efficient recovery of the template in a rotated and scaled image.

To this watermark is added a template in the Fourier transform domain to render the method robust against rotations and scaling, or aspect ratio changes. We ...

We detail a new algorithm for the accurate and efficient recovery of the template in an image which has undergone a general affine transformation.

ABSTRACT. This paper proposes a rotation, scaling, and translation. (RST) resistant watermarking over the template matching- based method.

Abstract: In digital watermarking techniques, the geometrical attacks are still an open problem. Affine transforms can be used.

The watermarks, which use the Fourier-Mellin transform, are designed to be robust mainly against the rotation, scales and translations. Template based schemes.

A watermark detector maps target media data into a log polar coordinate system and correlates the target media with a detection watermark to compute ...