Please use this identifier to cite or link to this item: https://doi.org/10.1117/1.1487853
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dc.titleShadow moiré topography using a flatbed scanner
dc.contributor.authorNg, T.W.
dc.contributor.authorTajuddin, A.
dc.date.accessioned2014-06-18T05:09:29Z
dc.date.available2014-06-18T05:09:29Z
dc.date.issued2002-08
dc.identifier.citationNg, T.W., Tajuddin, A. (2002-08). Shadow moiré topography using a flatbed scanner. Optical Engineering 41 (8) : 1908-1911. ScholarBank@NUS Repository. https://doi.org/10.1117/1.1487853
dc.identifier.issn00913286
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/67799
dc.description.abstractFlatbed scanners are high-quality digital image recording devices that are cost-effective and widely available. In this work we demonstrate their ability to register shadow moiré fringes for topographic analysis. The fringe image obtained in color had bluish and greenish regions that correspond, respectively, to the bright and dark fringes associated with the technique. The diffraction characteristic of light passing through gratings provided a ready explanation of this behavior. The gray-scale fringe image, obtained via direct conversion of the color pattern, had rather poor contrast. Processing this gray-scale image produced only marginal improvements in contrast. The approach of separating the color image into its blue and green components, followed by gray-scale conversion, subtraction, and other processing operations, generated images with significantly higher contrast. © 2002 Society of Photo-Optical Instrumentation Engineers.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1117/1.1487853
dc.sourceScopus
dc.subjectFringe analysis
dc.subjectMoiré
dc.subjectScanners
dc.typeArticle
dc.contributor.departmentBACHELOR OF TECHNOLOGY PROGRAMME
dc.description.doi10.1117/1.1487853
dc.description.sourcetitleOptical Engineering
dc.description.volume41
dc.description.issue8
dc.description.page1908-1911
dc.description.codenOPEGA
dc.identifier.isiut000177626800023
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