Robustness-set in watermarking embedding systems using codebook classifications

  • Authors:

  • Wen-Ya Chiang;Shiuh-Jeng Wang;Chi-Yao Weng;Cheng-Hsing Yang

  • Affiliations:

  • Central Police University, Taoyuan, Taiwan;Central Police University, Taoyuan, Taiwan;National Tsing-Hua University, Hsinchu, Taiwan;University of Education, PingTung, Taiwan

  • Venue:
  • Proceedings of the 3rd International Conference on Ubiquitous Information Management and Communication
  • Year:
  • 2009

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Abstract

In this paper we propose a new watermark technique which combines bit rotation, codebook and coordinate plane division for gray-level image. We embedded binary watermark into the gray-level image successfully by selecting and rotating the pixel bits, classifying codebook and dividing the coordinate plane. Besides that to achieve more robustness, parameter setting is more important. Our scheme is flexible since the user can choose the properties of the stego image, in terms of watermarking size, randomized bit embedding and robustness to avoid frequent image multimedia attacks in computer systems. From the experimental results, it can be visualized that our scheme can extract the identifiable watermark even after image processing attacks such as cropping and JPEG compression. Proposed scheme is better than the recent study of Wu and Chang scheme in terms of robustness.