Digital Watermarking of Medical Image Based on Public Key Encryption Algorithm Considering ROI

ROI를 고려한 공개키 암호화 알고리즘 기반 의료영상 디지털 워터마킹

  • 이형교 (안동과학대학 의료정보과) ;
  • 김희정 (부산외국어대학교 교양연계부) ;
  • 성택영 (부산외국어대학교 대학원 전자컴퓨터공학과) ;
  • 권기룡 (부산외국어대학교 디지털정보공학부) ;
  • 이종극 (동의대학교 컴퓨터공학과)
  • Published : 2005.11.01

Abstract

Recently, the medical image has been digitized by the development of computer science and digitization of the medical devices. There are needs for database service of the medical image and long term storage because of the construction of PACS(picture archiving and communication system) following DICOM(digital imaging communications in medicine) standards, telemedicine, and et al. However, it also caused some kinds of problems, such as illegal reproduction of medical image, proprietary rights and data authentication. In this paper, we propose the new digital watermarking technique for medical image based on public key encryption algorithm for integrity verification. It prevents illegal forgery that can be caused after transmitting medical image data remotely. The watermark is the value of bit-plane in wavelet transform of the original image for certification method of integrity verification. We proposed the embedding regions are randomly chosen considering ROI, and a digital signature is made using hash function of MD5 which input is a secret key. The experimental results show that the watermark embedded by the proposed algorithm can survive successfully in image processing operations and that the watermark's invisibility is good.