The KIPS Transactions:PartB (정보처리학회논문지B)

Korea Information Processing Society (한국정보처리학회)
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A adaptively robust method of DCT-based watermarking

DCT 기반 워터마킹의 적응적 강인화 방법

  • Published : 2003.10.01
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Abstract

In this paper, we propose an improved method of watermarking to increase the invisibility of a watermark and robustness against attacks for the purpose of removing the embedded watermark. The proposed method adaptively selects DCT blocks and determines position and intensity for watermarking based on the characteristics of human visual system. The used features are texture, luminance and contrast. We show the experimental results against image processing attacks such as cropping, image enhancement, low pass filtering, and JPEG compression, and then discuss the performance of the proposed method.

본 논문에서는 인간시각에 대한 워터마크의 무감지성을 향상하고 워터마크를 제거하고자 하는 공격에 강인한 워터마킹 방법을 제안한다. 제안하는 방법은 워터마크를 삽입할 대상의 DCT 블록에 대한 인간의 시각적인 특성을 고려하여 워터마크의 삽입 여부와 블록에 삽입될 워터마크의 위치와 강도를 적응적으로 결정한다. 워터마크될 블록을 선택하기 위하여 사용되는 특징은 텍스쳐, 휘도, 대비이다. 본 논문은 제안된 방법의 성능을 평가하기 위하여 절단, 영상강화, 저주파 필터링, PEG 압축의 영상처리 공격에 대한 실험결과를 보인다.

Keywords

References

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