Development of Multiband Scanner for Examination of Questioned Documents

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  • 偽変造文書鑑定用マルチバンドスキャナの開発
  • ギヘンゾウ ブンショ カンテイヨウ マルチバンド スキャナ ノ カイハツ

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Abstract

We have developed a novel multiband scanner for examination of questioned documents. This scanner has six light sources built-in, one white light source for reflection, one white light source for transmission, one ultraviolet light source, and three kinds of infrared light sources. In the examination, a questioned document was put on the glass surface of the scanner as it is, and was scanned sequentially by the six light sources switched automatically. The resultant images were stored in the personal computer immediately after the examination and were available as the database. Additionally, each examination for questioned documents was conducted under the same conditions with the assistance of this scanner.

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