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

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

임의의 모양을 가지는 영상 객체에 적용 가능한 극좌표계 모양적응 이산변환(PSADT : Polar Coordinates Shape Adaptive Discrete Transform)에 기반한 워터마킹 기법

PSADT(Polar Coordinates Shape Adaptive Discrete Transform) Based Watermarking Scheme for Arbitrary Shape Object

  • 고윤호 (한국과학기술원 전자전산학과) ;
  • 윤병주 (한국과학기술원 전자전산학과) ;
  • 이훈철 (한국과학기술원 전자전산학과) ;
  • 김승대 (한국과학기술원 전자전산학과) ;
  • 유상조 (인하대학교 정보통신 전문대학원)
  • Go, Yun-Ho (Dept. of Electronic Computer Science, Korea Advanced Institute of Science and Technology) ;
  • Yun, Byeong-Ju (Dept. of Electronic Computer Science, Korea Advanced Institute of Science and Technology) ;
  • Lee, Hun-Cheol (Dept. of Electronic Computer Science, Korea Advanced Institute of Science and Technology) ;
  • Kim, Seung-Dae (Dept. of Electronic Computer Science, Korea Advanced Institute of Science and Technology) ;
  • Yu, Sang-Jo
  • 발행 : 2002.03.01
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초록

본 논문에서는 임의의 모양을 가지는 영상 객체(image object)에 적용 가능한 모양적응 이산변환(PSADT : Polar coordinates shape adaptive discrete transform)에 기반한 새로운 워터마킹 기법을 제안한다. 대수-극 좌표계(log-polar coordinates)와 모양적응 이산변환을 이용하여 제안된 기법은 MPEC-4의 VOP와 같은 임의의 모양을 가지는 영상 객체에 적용할 수 있을 뿐만 아니라 기존 기법에 비하여 회전과 크기 변화와 같은 기하학적인 공격에 대하여 우수한 강인성을 제공한다.

In this paper, we propose a new image-watermarking scheme lot arbitrarily shaped object based on Polar coordinates Shape Adaptive Discrete Transform (PSADT). Using log-polar coordinates conversion and shape adaptive discrete transform, the proposed watermarking method can be applied to any arbitrarily shaped image-object such as MPEG-4 VOP and is much more robust to geometrical attacks such as rotation and scaling than the conventional methods.

키워드

참고문헌

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