Sensors 2014, 14(2), 3095-3129; doi:10.3390/s140203095
Article

Finger-Vein Image Enhancement Using a Fuzzy-Based Fusion Method with Gabor and Retinex Filtering

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Received: 12 December 2013; in revised form: 10 February 2014 / Accepted: 11 February 2014 / Published: 17 February 2014
(This article belongs to the Section Physical Sensors)
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.
Abstract: Because of the advantages of finger-vein recognition systems such as live detection and usage as bio-cryptography systems, they can be used to authenticate individual people. However, images of finger-vein patterns are typically unclear because of light scattering by the skin, optical blurring, and motion blurring, which can degrade the performance of finger-vein recognition systems. In response to these issues, a new enhancement method for finger-vein images is proposed. Our method is novel compared with previous approaches in four respects. First, the local and global features of the vein lines of an input image are amplified using Gabor filters in four directions and Retinex filtering, respectively. Second, the means and standard deviations in the local windows of the images produced after Gabor and Retinex filtering are used as inputs for the fuzzy rule and fuzzy membership function, respectively. Third, the optimal weights required to combine the two Gabor and Retinex filtered images are determined using a defuzzification method. Fourth, the use of a fuzzy-based method means that image enhancement does not require additional training data to determine the optimal weights. Experimental results using two finger-vein databases showed that the proposed method enhanced the accuracy of finger-vein recognition compared with previous methods.
Keywords: finger-vein recognition; enhancement method; Gabor and Retinex filtering; fuzzy-based method
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MDPI and ACS Style

Shin, K.Y.; Park, Y.H.; Nguyen, D.T.; Park, K.R. Finger-Vein Image Enhancement Using a Fuzzy-Based Fusion Method with Gabor and Retinex Filtering. Sensors 2014, 14, 3095-3129.

AMA Style

Shin KY, Park YH, Nguyen DT, Park KR. Finger-Vein Image Enhancement Using a Fuzzy-Based Fusion Method with Gabor and Retinex Filtering. Sensors. 2014; 14(2):3095-3129.

Chicago/Turabian Style

Shin, Kwang Y.; Park, Young H.; Nguyen, Dat T.; Park, Kang R. 2014. "Finger-Vein Image Enhancement Using a Fuzzy-Based Fusion Method with Gabor and Retinex Filtering." Sensors 14, no. 2: 3095-3129.

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