Robust template matching for affine resistant image watermarks

  • Authors:
  • S. Pereira;T. Pun

  • Affiliations:
  • Geneva Univ.;-

  • Venue:
  • IEEE Transactions on Image Processing
  • Year:
  • 2000

Quantified Score

Hi-index 0.01

Visualization

Abstract

Digital watermarks have been proposed as a method for discouraging illicit copying and distribution of copyrighted material. This paper describes a method for the secure and robust copyright protection of digital images. We present an approach for embedding a digital watermark into an image using the Fourier transform. To this watermark is added a template in the Fourier transform domain to render the method robust against general linear transformations. We detail a new algorithm based on polar maps for the accurate and efficient recovery of the template in an image which has undergone a general affine transformation. We also present results which demonstrate the robustness of the method against some common image processing operations such as compression, rotation, scaling, and aspect ratio changes