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. 2012 Mar 27;12(4):4133–4155. doi: 10.3390/s120404133

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© 2012 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Figure 6. — Example showing the discriminatory effect of the differential pattern images. The ellipse indicates two apparently illuminated fibers. Due to the ambiguity of their state they are considered “unlit”.