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Sensors 2013, 13(3), 3799-3815; doi:10.3390/s130303799

Sliding Window-Based Region of Interest Extraction for Finger Vein Images

School of Computer Science and Technology, Shandong University, Jinan 250101, China
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Received: 29 January 2013 / Revised: 8 March 2013 / Accepted: 14 March 2013 / Published: 18 March 2013
(This article belongs to the Section Physical Sensors)
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Abstract

Region of Interest (ROI) extraction is a crucial step in an automatic finger vein recognition system. The aim of ROI extraction is to decide which part of the image is suitable for finger vein feature extraction. This paper proposes a finger vein ROI extraction method which is robust to finger displacement and rotation. First, we determine the middle line of the finger, which will be used to correct the image skew. Then, a sliding window is used to detect the phalangeal joints and further to ascertain the height of ROI. Last, for the corrective image with certain height, we will obtain the ROI by using the internal tangents of finger edges as the left and right boundary. The experimental results show that the proposed method can extract ROI more accurately and effectively compared with other methods, and thus improve the performance of finger vein identification system. Besides, to acquire the high quality finger vein image during the capture process, we propose eight criteria for finger vein capture from different aspects and these criteria should be helpful to some extent for finger vein capture. View Full-Text
Keywords: finger vein image; ROI extraction; sliding window; phalangeal joint; capture criteria finger vein image; ROI extraction; sliding window; phalangeal joint; capture criteria
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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Yang, L.; Yang, G.; Yin, Y.; Xiao, R. Sliding Window-Based Region of Interest Extraction for Finger Vein Images. Sensors 2013, 13, 3799-3815.

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