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A Watermarking Scheme Based on the Characteristic of Addition among DCT Coefficients

  • Minoru Kuribayashi
  • Hatsukazu Tanaka
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 1975)

Abstract

Generally, low frequency domain may be useful to embed a watermark in an image. However, if a watermark is embedded into low frequency components, blocking effects may occur in the image. Then considering blocking effects, we study some characteristics among DCT coeffcients and find some interesting mutual relations. Here, the robustness of many schemes based on the orthogonal transformations such as DCT may be doubtful against geometric transformations. For the distortions produced by some geometric transformations, we propose a searching protocol to find the watermarked block which is rotated and shifted. In the proposed scheme, a watermark can remain in the attacked image with very high probability in our scheme. Further, the watermark becomes more robust than the above scheme using error-correction.

Keywords

Watermark Scheme Digital Content JPEG Compression Digital Watermark Geometric Transformation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • Minoru Kuribayashi
    • 1
  • Hatsukazu Tanaka
    • 2
  1. 1.Division of Electrical and Electronics EngineeringGraduate School of Science and TechnologyKobe UniversityKobeJapan
  2. 2.Department of Electrical and Electronics EngineeringFaculty of EngineeringKobe UniversityKobeJapan

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