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Sensors 2017, 17(4), 925; doi:10.3390/s17040925

Imaging of the Finger Vein and Blood Flow for Anti-Spoofing Authentication Using a Laser and a MEMS Scanner

1
School of Mechanical Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Korea
2
Department of Biomedical Science & Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Korea
3
Fiber Optic Electronic R&D Center, Korea Optron Corporation (KOC), Gwangju 61007, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Aydogan Ozcan
Received: 4 January 2017 / Revised: 15 March 2017 / Accepted: 19 April 2017 / Published: 22 April 2017
(This article belongs to the Section Biosensors)
View Full-Text   |   Download PDF [2584 KB, uploaded 22 April 2017]   |  

Abstract

A new authentication method employing a laser and a scanner is proposed to improve image contrast of the finger vein and to extract blood flow pattern for liveness detection. A micromirror reflects a laser beam and performs a uniform raster scan. Transmissive vein images were obtained, and compared with those of an LED. Blood flow patterns were also obtained based on speckle images in perfusion and occlusion. Curvature ratios of the finger vein and blood flow intensities were found to be nearly constant, regardless of the vein size, which validated the high repeatability of this scheme for identity authentication with anti-spoofing. View Full-Text
Keywords: infrared imaging; MEMS scanner; speckle imaging; transmission infrared imaging; MEMS scanner; speckle imaging; transmission
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Lee, J.; Moon, S.; Lim, J.; Gwak, M.-J.; Kim, J.G.; Chung, E.; Lee, J.-H. Imaging of the Finger Vein and Blood Flow for Anti-Spoofing Authentication Using a Laser and a MEMS Scanner. Sensors 2017, 17, 925.

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