A reversible watermark scheme combined with hash function and lossless compression

  • Authors:

  • YongJie Wang;Yao Zhao;Jeng-Shyang Pan;ShaoWei Weng

  • Affiliations:

  • Institute of Information Science, Beijing Jiaotong University, P.R. China;Institute of Information Science, Beijing Jiaotong University, P.R. China;National Kaohsiung University of Applied Sciences, Taiwan;Institute of Information Science, Beijing Jiaotong University, P.R. China

  • Venue:
  • KES'05 Proceedings of the 9th international conference on Knowledge-Based Intelligent Information and Engineering Systems - Volume Part II
  • Year:
  • 2005

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Abstract

The paper presents a reversible watermark scheme based on hash function and lossless compression technology. The paper extracts the abstract information of the image as hash code and lossless compresses the LSB(Least Significant Bit) of the image to make some space where the image hash can be completely inserted. It needs to be done without introducing a large distortion to the image. The scheme can achieve the authentication purpose by hash code and restores the original image by retrieving the watermark sequence completely because of the lossless decompression of the LSB of the image.