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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Examples of correct classification with (a) original DVLFPD-DB1, (b) degraded DVLFPD-DB1, and (c) OSU color-thermal database. In (a–c), left and right images show the examples of TP and TN candidates, respectively.