대한전자공학회논문지SP (Journal of the Institute of Electronics Engineers of Korea SP)

대한전자공학회 (The Institute of Electronics and Information Engineers)
권호 표지

웨이블렛 영역에서 근사 계수의 증감정보를 이용한 블라인드 워터마크

A Blind Watermarking Technique Using Difference of Approximation Coefficients in Wavelet Domain

  • 윤혜진 (광주과학기술원 기전공학과) ;
  • 최태선 (광주과학기술원 기전공학과)
  • 발행 : 2004.03.01
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초록

본 논문에서는 강인성과 인지성을 함께 발전시킨 블라인드 워터마킹 방법에 대해 언급한다. 워터마크의 삽입 위치를 선정하기 위해 영상을 이산 웨이블렛 변환한 후 이웃한 관사 계수간의 증감 정보를 이용한다. 제안된 방법을 시험하기 위해 실험 영상에 워터마크를 삽입한 후 JPEG 손실 압축과 여러 필터의 적용과 같은 변형을 가하여 삽입한 워터마크를 다시 찾아내는 실험을 실시한다. 실험 결과는 제안된 워터마킹 방법이 비인지성을 유지하면서도 여러 가지 공격(attack)에 강인함을 보여준다.

In this paper, we propose a new blind image watermarking method in wavelet domain. It is necessary to find out watermark insertion location in blind watermark. To select the watermark embedding locations, we use the increment and decrement information of the successive approximation coefficients after discrete wavelet transformed. In order to evaluate the proposed algorithm we embed watermark into test images and detect the watermark after attacks like JPEG lossy compression and performing of various liters. Experimental results show that the proposed method is robust against various kinds of attacks and still remains transparency.

키워드

참고문헌

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