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Detection and Removal of Hidden Data in Images Embedded with Quantization Index Modulation

  • Kaiwen Zhang
  • Shuozhong Wang
  • Xinpeng Zhang
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 2776)

Abstract

Methods of attack on watermarks embedded with quantization index modulation and block DCT are introduced in this paper. The proposed method can detect the presence of hidden data by analyzing the histogram or spectrum of the transform coefficients, and prevent their extraction without further degrading the image. It is shown that, in some cases, the embedding-induced distortion can even be reduced in terms of peak-signal-to-noise ratio. Experimental results are given to show the effectiveness of the method.

Keywords

Hide Data Digital Watermark Quantization Step Watermark Embedding Quantization Index Modulation 
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 2003

Authors and Affiliations

  • Kaiwen Zhang
    • 1
  • Shuozhong Wang
    • 1
  • Xinpeng Zhang
    • 1
  1. 1.Communication & Information EngineeringShanghai UniversityShanghaiChina

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