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Background compensation in computer screen photo-assisted reflectance fingerprinting
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Applied Physics .
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Applied Physics .
2006 (English)In: Sensors and actuators. B, Chemical, ISSN 0925-4005, Vol. 120, no 1, 79-85 p.Article in journal (Refereed) Published
Abstract [en]

The computer screen photo-assisted technique (CSPT) is a method for the classification of colorimetric assays utilizing ordinary computer sets and web cameras as instrumentation. In CSPT measurements the web camera captures the image of the assay under the screen illumination, and typically a spurious spatial distribution of intensities is overlapped on the image. This issue is examined here, focusing on the effect of the sample and illuminating colors on the spatial modulation of intensity. A method for the selection of colors composing an illuminating sequence that minimizes the spatial variability is proposed. The approach is tested for the classification of different color substances showing improvements up to 53% of the intra/inter cluster distance ratio measured in a PCA space, when compared to randomly chosen colors. © 2006 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
2006. Vol. 120, no 1, 79-85 p.
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Natural Sciences
Identifiers
URN: urn:nbn:se:liu:diva-37494DOI: 10.1016/j.snb.2006.01.055Local ID: 36388OAI: oai:DiVA.org:liu-37494DiVA: diva2:258343
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2011-01-11

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Filippini, DanielLundström, Ingemar

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