University of Twente Student Theses


Understanding and Modelling the Vascular Biometric Imaging Procedure

Spek, M. J. van der (2022) Understanding and Modelling the Vascular Biometric Imaging Procedure.

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Abstract:In finger vascular biometric images, captured with near-infrared (NIR) light, several structures are visible, from which the exact origin is unknown. These include the vagueness, width and intensity of the vessel projection, the brightness of the two joints and the intensity of the dark area between the joints. These features vary per subject. To understand the origin of these elements, the imaging procedure is mimicked using a simplified mathematical model of the finger. This model creates images similar to real finger vascular images incorporating basic anatomy and corresponding optical properties. Using the model, the origin of several features is examined. The vessels appear vague, because the projection is actually a shadow caused by the strong scattering of the bone. The intensity of the finger (besides the vessels) is directly dependent on both tissue consistency (amount of absorption/scattering) and finger anatomy (path length of the photons). This research gives an insight on the vascular imaging procedure and this knowledge can be used in future research on vascular biometric identification, by incorporating additional features from the images.
Item Type:Essay (Master)
Faculty:EEMCS: Electrical Engineering, Mathematics and Computer Science
Subject:50 technical science in general
Programme:Electrical Engineering MSc (60353)
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