Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Robust Watermarking Using a Block-based Statistical Analysis in DCT Domain

DCT 영역에서 블록 기반의 통계적 분석을 이용한 강인한 워터마킹

  • Lim, Hyun (Dept. of Electronics Engineering, Mokpo National University) ;
  • Kim, Gui-Hyun (Dept. of Electronics Engineering, Mokpo National University) ;
  • Park, Soon-Young (Dept. of Electronics Engineering, Mokpo National University) ;
  • Bang, Man-Won (Dept. of Electronics Engineering, Mokpo National University)
  • 임현 (목포대학교 전자공학과) ;
  • 김귀현 (목포대학교 전자공학과) ;
  • 박순영 (목포대학교 전자공학과) ;
  • 방만원 (목포대학교 전자공학과)
  • Published : 2001.09.01
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Abstract

In this paper, a robust watermarking technique is presented by using a block-based statistics in DCT domain. First, the proposed technique calculates JND threshold value using the global statistics in DCT domain. Then watermark insertion is carried out by inserting one watermark into coefficients which are above the threshold value J within a 2${\times}$2 block. Finally, watermark is estimated by averaging the extracted watermarks from the coefficients which are above the threshold in a window. In experiments it is shown that the proposed techniques can enhance perceptual invisibility and robustness against additive noise and JPEG compression attacks by using the characteristics of JND.

Keywords