{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,12]],"date-time":"2025-11-12T03:26:36Z","timestamp":1762917996607,"version":"build-2065373602"},"reference-count":20,"publisher":"MDPI AG","issue":"14","license":[{"start":{"date-parts":[[2019,7,20]],"date-time":"2019-07-20T00:00:00Z","timestamp":1563580800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100000923","name":"Australian Research Council","doi-asserted-by":"publisher","award":["DP190102443"],"award-info":[{"award-number":["DP190102443"]}],"id":[{"id":"10.13039\/501100000923","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001801","name":"University of Western Australia","doi-asserted-by":"publisher","award":["00609 10300067"],"award-info":[{"award-number":["00609 10300067"]}],"id":[{"id":"10.13039\/501100001801","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>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.<\/jats:p>","DOI":"10.3390\/s19143199","type":"journal-article","created":{"date-parts":[[2019,7,22]],"date-time":"2019-07-22T02:55:37Z","timestamp":1563764137000},"page":"3199","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Converting a Common Low-Cost Document Scanner into a Multispectral Scanner"],"prefix":"10.3390","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6294-0688","authenticated-orcid":false,"given":"Zohaib","family":"Khan","sequence":"first","affiliation":[{"name":"School of Information Technology and Mathematical Sciences, University of South Australia, Adelaide, SA 5095, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Faisal","family":"Shafait","sequence":"additional","affiliation":[{"name":"School of Electrical Engineering and Computer Science (SEECS), National University of Science and Technology (NUST), Islamabad 44000, Pakistan"},{"name":"Deep Learning Laboratory, National Center of Artificial Intelligence, Islamabad 44000, Pakistan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5206-3842","authenticated-orcid":false,"given":"Ajmal","family":"Mian","sequence":"additional","affiliation":[{"name":"Department of Computer Science and Software Engineering, The University of Western Australia, Crawley, WA 6009, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2019,7,20]]},"reference":[{"key":"ref_1","unstructured":"Leedham, S.S.G. (2003, January 2\u20135). A survey of computer methods in forensic handwritten document examination. Proceedings of the 11th Conference of the International Graphonomics Society, Scottsdale, AZ, USA."},{"key":"ref_2","unstructured":"Malik, M.I., Ahmed, S., Shafait, F., Mian, A.S., Nansen, C., Dengel, A., and Liwicki, M. (2015, January 21\u201324). Hyper-spectral analysis for automatic signature extraction. Proceedings of the 17th Conference of the International Graphonomics Society, Pointe-\u00e0-Pitre, Guadeloupe."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"294","DOI":"10.1016\/j.dsp.2018.03.015","article-title":"Detection of counterfeit banknotes using multispectral images","volume":"78","author":"Baek","year":"2018","journal-title":"Digit. 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