We propose the construction of a prototype scanner designed to capture multispectral images of documents. A standard sheet-feed scanner is modified by disconnecting its internal light source and connecting an external multispectral light source comprising of narrow band light emitting diodes (LED). A document is scanned by illuminating the scanner light guide successively with different LEDs and capturing a scan of the document. The system is portable and can be used for potential applications in verification of questioned documents, cheques, receipts and bank notes.
Cite
@article{arxiv.1904.12603,
title = {Converting a Common Document Scanner to a Multispectral Scanner},
author = {Zohaib Khan and Faisal Shafait and Ajmal Mian},
journal= {arXiv preprint arXiv:1904.12603},
year = {2019}
}