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. 2018 Jul 15;18(7):2296. doi: 10.3390/s18072296

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© 2018 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 (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Examples of the correct recognition cases. (a,b) the correct acceptance cases with SDU-DB and PolyU-DB, respectively. (c,d) the correct rejection cases with SDU-DB and PolyU-DB, respectively. In (a–d), upper and lower images show the enrolled and input images, respectively. In (a–d), left and middle images present the input and corresponding finger ROI. The right-upper images show that for obtaining the difference image for finger-vein recognition, whereas the right-lower images present the spectrogram images for finger shape recognition.

Examples of the correct recognition cases. (a,b) the correct acceptance cases with SDU-DB and PolyU-DB, respectively. (c,d) the correct rejection cases with SDU-DB and PolyU-DB, respectively. In (a–d), upper and lower images show the enrolled and input images, respectively. In (a–d), left and middle images present the input and corresponding finger ROI. The right-upper images show that for obtaining the difference image for finger-vein recognition, whereas the right-lower images present the spectrogram images for finger shape recognition.