{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T02:13:08Z","timestamp":1760235188478,"version":"build-2065373602"},"reference-count":14,"publisher":"MDPI AG","issue":"15","license":[{"start":{"date-parts":[[2021,7,28]],"date-time":"2021-07-28T00:00:00Z","timestamp":1627430400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Fluorescent markers are widely used to protect banknotes, passports, and other documents. Verification of such documents relies upon visual assessment of the markers revealed by ultraviolet (UV) radiation. However, such an explicit approach is inappropriate in certain circumstances, e.g., when discretely checking people for marks left by a pepper gel thrower. The UV light and fluorescent light must not be visible in such applications, yet reliable detection of the markers must still be performed. This problem was successfully resolved using TRIZ methodology, which led to a patent application. The main idea of the solution is to use low-intensity time-variable UV light for illuminating an object and process the image of the object acquired by a camera to detect colour changes too small to be noticed with the naked eye. This paper describes how popular graphics editors such as Adobe Photoshop Elements were used to validate the system concept devised. Simulation experiments used images taken in both visible and UV light to assess the effectiveness and perceptibility of the detection process. The advantage of such validation comes from using commodity software and performing the experiments without access to a laboratory and without physical samples, which makes this approach especially suitable in pandemic times.<\/jats:p>","DOI":"10.3390\/s21155104","type":"journal-article","created":{"date-parts":[[2021,7,28]],"date-time":"2021-07-28T21:21:04Z","timestamp":1627507264000},"page":"5104","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Using Off-the-Shelf Graphic Design Software for Validating the Operation of an Image Processing System"],"prefix":"10.3390","volume":"21","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3257-9726","authenticated-orcid":false,"given":"Jerzy","family":"Chrz\u0105szcz","sequence":"first","affiliation":[{"name":"Warsaw University of Technology, Institute of Computer Science, 00-665 Warsaw, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2021,7,28]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Valeur, B., and Berberan-Santos, M.N. (2012). Molecular Fluorescence: Principles and Applications, Wiley-VCH Verlag GmbH & Co. KGaA. [2nd ed.].","DOI":"10.1002\/9783527650002"},{"key":"ref_2","unstructured":"(2021, July 05). ISO 21348:2007\u2014Process for Determining Solar Irradiances. Available online: www.iso.org\/standard\/39911.html."},{"key":"ref_3","unstructured":"Chrz\u0105szcz, J. (2021, January 15\u201318). Imperceptible detection of fluorescence\u2014Using TRIZ to see the invisible. Proceedings of the MATRIZ International Conference TRIZfest-2021, online."},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Fey, V., and Rivin, E. (2005). Innovation on Demand: New Product Development Using TRIZ, Cambridge University Press.","DOI":"10.1017\/CBO9780511584237"},{"key":"ref_5","doi-asserted-by":"crossref","unstructured":"Gadd, K. (2011). TRIZ for Engineers: Enabling Inventive Problem Solving, Wiley.","DOI":"10.1002\/9780470684320"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1145\/2185520.2185561","article-title":"Eulerian video magnification for revealing subtle changes in the world","volume":"31","author":"Wu","year":"2012","journal-title":"ACM Trans. Graph."},{"key":"ref_7","unstructured":"(2021, July 05). Adobe Photoshop Elements. Available online: www.adobe.com\/products\/photoshop-elements.html."},{"key":"ref_8","unstructured":"(2021, July 05). Microsoft PowerPoint. Available online: www.microsoft.com\/en-us\/microsoft-365\/powerpoint."},{"key":"ref_9","unstructured":"(2021, July 05). Polish Security Printing Works. Available online: www.pwpw.pl\/Strefa_wiedzy,1.html."},{"key":"ref_10","unstructured":"(2021, July 05). Camera & Imaging Products Association. Available online: www.cipa.jp\/std\/std-sec_e.html."},{"key":"ref_11","unstructured":"(2021, July 05). Just-Noticeable Difference. Wikipedia. Available online: https:\/\/en.wikipedia.org\/wiki\/Just-noticeable_difference."},{"key":"ref_12","unstructured":"(2021, July 05). Flicker (Light). Wikipedia. Available online: https:\/\/en.wikipedia.org\/wiki\/Flicker_(light)."},{"key":"ref_13","unstructured":"(2021, July 05). Flicker Fusion Threshold. Wikipedia. Available online: https:\/\/en.wikipedia.org\/wiki\/Flicker_fusion_threshold."},{"key":"ref_14","unstructured":"(2021, July 05). GIMP-GNU Image Manipulation Program. Available online: www.gimp.org\/."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/21\/15\/5104\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T06:36:07Z","timestamp":1760164567000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/21\/15\/5104"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,7,28]]},"references-count":14,"journal-issue":{"issue":"15","published-online":{"date-parts":[[2021,8]]}},"alternative-id":["s21155104"],"URL":"https:\/\/doi.org\/10.3390\/s21155104","relation":{},"ISSN":["1424-8220"],"issn-type":[{"type":"electronic","value":"1424-8220"}],"subject":[],"published":{"date-parts":[[2021,7,28]]}}}