Image Quality and Temperature Before and After Repeated Fingerprint Samples

Abstract: This project is to establish whether the temperature of the finger changes over repeated samples, and whether there are any ramifications to image quality and fingerprint matching performance. The analysis statistically analyzed the image quality between the two (before and after images)

Methodology: The methodology involves having subjects interact with a commercially available 500 dpi optical sensor to acquire three images of the same dominant index finger which will also be used to record temperature. The user would then interact with eight other sensors (seven of them swipe, and one optical) using their dominant index finger on all sensors. The last sensor that the individual will interact with will be an optical sensor of the same model used at the beginning of the experiment. Similar to before, the subject will provide three additional images. After the final sensor, the temperature of the dominant index finger will be recorded again.

A commercially available image quality software will be used to calculate image quality for the fingerprint samples. In order to test if the image quality is the same before and after interaction, Wilcoxon Signed Rank Test for Paired Comparisons, which is a non-parametric test will be performed. VeriFinger 5.0 by Neurotechnologija will be used to measure False Non Match Rate (FNMR) and False Match Rate(FMR).

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