Improved watermark detection robust to camcorder capture based on quadrangle estimation

  • Authors:

  • Min-Jeong Lee;Kyung-Su Kim;Young-Ho Suh;Heung-Kyu Lee

  • Affiliations:

  • Korea Advanced Institute of Science and Technology, Department of Electrical Engineering and Computer Science;Korea Advanced Institute of Science and Technology, Department of Electrical Engineering and Computer Science;Convergent Contents Research Department, Contents Research Division, Electronics and Telecommunications Research Institute, Republic of Korea;Korea Advanced Institute of Science and Technology, Department of Electrical Engineering and Computer Science

  • Venue:
  • ICIP'09 Proceedings of the 16th IEEE international conference on Image processing
  • Year:
  • 2009

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Abstract

In this paper, we propose a blind watermark detection scheme which is robust against composite geometric distortions. The composite geometric distortions mean that an image or a video is rotated, perspective-projected, and resized at the same time. It commonly happens during capturing a movie in a theater by a camcorder illegally. Local auto-correlation function (LACF) with a novel estimation model is utilized for calculating composite geometric distortions. We demonstrate robustness of the presented scheme against composite geometric distortions for digital cinema.