The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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A New Wavelet Watermarking Based on Linear Bit Expansion

선형계수확장 기반의 새로운 웨이블릿 워터마킹

  • 박영일 (부경대학교 정보통신공학과) ;
  • 김석태 (부경대학교 전자컴퓨터정보통신공학부)
  • Published : 2007.01.31
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Abstract

This study proposes a new wavelet watermark technique based on the Linear Bit Expansion. To ensure the security of the watermark, enlarged watermark by applying linear bit expansion is inserted in a given intensity to a low frequency subband of the image which is wavelet transformed after the Arnold Transformation. When detecting the presence of watermart F norm function is applied unlike the existing methods. The experiment results verify that the proposed watermarking technique has outstanding quality in regards to fidelity and robustness.

본 논문에서는 선형계수확장 기반의 웨이블릿 워터마킹 기법을 제안하였다. 워터마크의 안정성을 위해 먼저 워터마크에 대해 Arnold 변환을 한 후, 선형계수확장을 적용하여 확대된 워터마크를 웨이블릿 변환 된 영상의 저주파대에 일정한 강도로 삽입하였으며 추출 시에는 기존 방법과 달리 F-노름(norm) 함수를 적용하였다. 실험결과 본 논문에서 제안한 방법은 충실도와 강인성 측면에서 우수한 특성을 가짐을 확인하였다.

Keywords

References

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