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Illumination for a finger-vein

Scheer, K.E. van der (2017) Illumination for a finger-vein.

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Abstract:Finger-vein images can be used as biometric, which can be used to identify a person. The veins can be made visible by infrared light. The most common way to do this is by using emitters above the finger, where light spreads around the bone and makes the veins visible. Then an image of the veins is made by placing an infrared camera below the finger. A design was made to apply light from different angles to the finger to find out how this compares to lighting from above. We found that when you illuminate the finger from the sides there is reflection of creases and features of the skin. The image is locally saturated due to strong emissions through the finger. This does not occur when you place the light source above the finger, and there is no light reflected in to the camera. When light is applied from below there is a lot of reflection which makes it impossible to see the veins, but lighting from the side makes a lot of veins visible comparable to lighting from above.
Item Type:Essay (Bachelor)
Faculty:EEMCS: Electrical Engineering, Mathematics and Computer Science
Subject:53 electrotechnology
Programme:Electrical Engineering BSc (56953)
Link to this item:http://purl.utwente.nl/essays/77366
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