Invisible calibration pattern based on human visual perception

Hironori Takimoto, Seiki Yoshimori, Yasue Mitsukura, Minoru Fukumi

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Pages (from-to)1440-1447+19
JournalIEEJ Transactions on Electronics, Information and Systems
Issue number8
Publication statusPublished - 2010
Externally publishedYes


  • Calibration pattern
  • Human vision
  • Image processing
  • Steganography
  • Watermark

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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