Invisible Calibration Pattern based on Human Visual Perception

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  • Takimoto Hironori
    Faculty of Computer Science and Syst. Eng., Okayama Prefectural University
  • Yoshimori Seiki
    Dept. of Media Technologies, Faculty of Eng., Nippon Bunri University
  • Mitsukura Yasue
    Graduate School of Bio-Applications and System Enginnering, Tokyo University of Agriculture and Technology
  • Fukumi Minoru
    Dept. of Information Science & Intteligent Syst., Faculty of Eng., University of Tokushima

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Other Title
  • 人の視知覚特性に基づく視認困難なキャリブレーションパターン
  • ヒト ノ シ チカク トクセイ ニ モトズク シニンコンナン ナ キャリブレーションパターン

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In this paper, we propose an arrangement and detection method of an invisible calibration pattern based on characteristics of human visual perception. A calibration pattern is arranged around contents where invisible data is embedded, as some feature points between an original image and the scanned image for normalization of the scanned image. However, it is clear that conventional methods interfere with page layout and artwork of contents. Moreover, conventional visible patterns show a third person the position of embedded data. Therefore, visible calibration patterns are not suitable for security service. The most important part of human visual perception in the proposed method is the spectral luminous efficiency characteristic and the chromatic spatial frequency characteristic. In addition, a back ground color in surrounding of contents is not restricted to uniform color by using the proposed calibration pattern. It is suggest that the proposed method protect page layout and artwork.

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