Converting a common low-cost document scanner into a multispectral scanner

Zohaib Khan, Faisal Shafait, Ajmal Mian

Research output: Contribution to journalArticle

Abstract

Forged documents and counterfeit currency can be better detected with multispectral imaging in multiple color channels instead of the usual red, green and blue. However, multispectral cameras/scanners are expensive. We propose the construction of a low cost scanner designed to capture multispectral images of documents. A standard sheet-feed scanner was modified by disconnecting its internal light source and connecting an external multispectral light source comprising of narrow band light emitting diodes (LED). A document was scanned by illuminating the scanner light guide successively with different LEDs and capturing a scan of the document. The system costs less than a hundred dollars and is portable. It can potentially be used for applications in verification of questioned documents, checks, receipts and bank notes.

Original languageEnglish
Article number3199
JournalSensors (Switzerland)
Volume19
Issue number14
DOIs
Publication statusPublished - 2 Jul 2019

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Multispectral scanners
scanners
Light emitting diodes
Light sources
Light
Costs and Cost Analysis
Costs
Cameras
Color
light sources
Imaging techniques
light emitting diodes
illuminating
narrowband
cameras
costs
color

Cite this

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Converting a common low-cost document scanner into a multispectral scanner. / Khan, Zohaib; Shafait, Faisal; Mian, Ajmal.

In: Sensors (Switzerland), Vol. 19, No. 14, 3199, 02.07.2019.

Research output: Contribution to journalArticle

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