Journal of the Institute of Convergence Signal Processing (융합신호처리학회논문지)

The Korea Institute of Convergence Signal Processing (한국융합신호처리학회)
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A Study on the Selection of the Optimal Insertion Region for Digital Watermarking in the Frequency Domain

주파수 영역에서의 최적 워터마크 삽입영역 선정에 대한 연구

  • 오재호 (순천향대학교 정보통신공학과) ;
  • 조시용 (순천향대학교 정보통신공학과) ;
  • 김선형 (순천향대학교 정보통신공학과)
  • Published : 2002.07.01
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Abstract

In this paper, we proposed a digital watermarking method based on the edge-wavelet transform to protect digital contents copyrights. We find out the optimal watermark insertion region and the proper amount of watermark in order to satisfy robustness and imperceptibility against various attacks such as noise, compression, collusion, clipping, scaling. Especially through this experiment, we could find out the adequate location of watermark insertion and proper amount of watermark and it is also viewed to satisfy robustness and imperceptibility in the lower frequency region with small watermark quantity.

본 논문에서는 디지털 컨텐츠 저작권 보호를 위해서 에지 웨이브릿 변환에 기초한 디지털 워터마킹 방법을 제안하였다. 이미지의 중요한 성분인 저주파 성분을 비롯한 각 대역의 모든 가능한 위치에 다양한 가중치와 임계값을 적용하는 워터마크 삽입방법을 통하여 손실압축, 고의적인 영상의 변형 등 각종 공격에 대하여 상반관계에 있는 비가시성과 강인성을 만족하는 워터마크 양에 대한 적정량 선정과 최적의 삽입대역을 찾는 방법을 제안하였다. 그리고 제안한 방법이 적정한 워터마크 삽입영역과 적절한 워터마크 양을 찾을 수 있음을 실험을 통하여 입증하였다.

Keywords

References

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