Reversible Image Watermarking with Differential Histogram Shifting and Error Prediction Compensation

차이값 히스토그램 쉬프팅과 오류 예측 보정을 이용한 가역 영상 워터마킹

  • 여동규 (국립금오공과대학교 컴퓨터공학부) ;
  • 이해연 (국립금오공과대학교 컴퓨터공학부) ;
  • 김병만 (국립금오공과대학교 컴퓨터공학부) ;
  • 김경수 (KT 네트워크연구소)
  • Received : 2009.11.18
  • Accepted : 2010.04.08
  • Published : 2010.06.15

Abstract

Reversible watermarking inserts watermark into digital media in such a way that visual transparency is preserved and then enables to restore the original media from the marked one without any loss of media quality. This watermarking can be applied to quality-sensitive imaging such as medical imaging, military imaging, remote-sensing imaging, and precious artwork, where the original media should be preserved during image processing and analysis. In this paper, a reversible image watermarking technique that embeds message bits by modifying the differential histogram of adjacent pixels is presented. In order to satisfy both high embedding capacity and visual quality, the proposed technique exploits the fact that adjacent pixels in the image have highly spatial correlation. Also, we prevent overflow/underflow problem and salt-and-pepper artifacts by employing a predicted error compensation scheme. Through experiments using various test images, we prove that the presented technique provides perfect reversibility and high embedding capacity, while maintaining the induced-distortion low.

Acknowledgement

Supported by : 한국문화콘텐츠진흥원

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