한국멀티미디어학회논문지 (Journal of Korea Multimedia Society)

  • 제16권10호
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  • Pages.1163-1170
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  • 2013
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  • 1229-7771(pISSN)
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  • 2384-0102(eISSN)
한국멀티미디어학회 (Korea Multimedia Society)
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저작권 보호를 위한 DCT 영역에서의 향상된 CRT 기반 영상 워터마킹

Improved CRT-based Image Watermarking in DCT Domain for Copyright Protection

  • 배성호 (동명대학교 의용공학과)
  • 투고 : 2013.08.26
  • 심사 : 2013.09.17
  • 발행 : 2013.10.30
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⟨ 이전 논문 다음 논문 ⟩

초록

디지털 워터마킹은 저작권 보호와 멀티미디어 데이터 인증의 수단으로 사용되어 왔다. 기존의 공간영역에서의 CRT 기반 워터마킹 방법은 JPEG 압축에 취약하여, JPEG 압축에서 잘 동작하는 DCT 영역에서의 CRT 기반 워터마킹이 제안되었다. 본 논문에서는 DCT 영역에서의 향상된 CRT 기반 워터마킹 방법을 제안한다. 제안한 방법은 DCT 변환시 발생되는 rounding 오류 또는 여러 가지 공격에도 나머지들의 차에 대한 절대값의 변화를 감소시켜 견고성을 향상시킨다. 실험을 통하여 제안한 방법이 기존의 DCT 영역에서의 CRT 기반 워터마킹 방법보다 여러 가지 공격에 대하여 견고성이 향상되는 것을 확인하였다.

Digital watermarking techniques have been used as one of the means for copyright protection and authentication of multimedia data. Conventional Chinese Remainder Theorem(CRT)-based spatial domain watermarking techniques do not perform well under JPEG compression. However, it is seen that the CRT-based watermarking technique in Discrete Cosine Transform(DCT) domain performs well for JPEG compression. In this paper, an improved CRT-based image watermarking method in the DCT domain is proposed. The proposed method provides better robustness which decreases changes of absolute difference of residues against rounding errors due to DCT conversion and various attacks. Experimental results show that the proposed method has a good robustness against various attacks compared with the conventional CRT-based watermarking in DCT domain.

키워드

참고문헌

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피인용 문헌

  1. Geometry Transformation in Spatial Domain Using Coefficient Changes in Frequency Domain toward Lightweight Image Encryption vol.42, pp.2, 2015, https://doi.org/10.5626/JOK.2015.42.2.162
  2. An Iterative CRT Based Image Watermarking on DCT Domain vol.24, pp.2, 2013, https://doi.org/10.9708/jksci.2019.24.02.041
  3. 마이데이터 개념을 활용한 탈중앙화 저작권 관리 모델 vol.23, pp.2, 2020, https://doi.org/10.9717/kmms.2020.23.2.262