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Open AccessArticle

Experimental Validation of a Reliable Palmprint Recognition System Based on 2D Ultrasound Images

School of Engineering, University of Basilicata, Viale dell’Ateneo Lucano 10, 85100 Potenza, Italy
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Electronics 2019, 8(12), 1393; https://doi.org/10.3390/electronics8121393
Received: 30 September 2019 / Revised: 12 November 2019 / Accepted: 20 November 2019 / Published: 22 November 2019
(This article belongs to the Special Issue Recent Advances in Biometrics and its Applications)
Ultrasound has been trialed in biometric recognition systems for many years, and at present different types of ultrasound fingerprint readers are being produced and integrated in portable devices. An important merit of the ultrasound is its ability to image the internal structure of the hand, which can guarantee improved recognition rates and resistance to spoofing attacks. In addition, ambient noise like changes of illumination, humidity, or temperature, as well as oil or ink stains on the skin do not affect the ultrasound image. In this work, a palmprint recognition system based on ultrasound images is proposed and experimentally validated. The system uses a gel pad to obtain acoustic coupling between the ultrasound probe and the user’s hand. The collected volumetric image is processed to extract 2D palmprints at various under-skin depths. Features are extracted from one of these 2D palmprints using a line-based procedure. Recognition performances of the proposed system were evaluated by performing both verification and identification experiments on a home-made database containing 281 samples collected from 32 different volunteers. An equal error rate of 0.38% and an identification rate of 100% were achieved. These results are very satisfactory, even if obtained with a relatively small database. A discussion on the causes of bad acquisitions is also presented, and a possible solution to further optimize the acquisition system is suggested. View Full-Text
Keywords: 3D imaging; ultrasound system; acoustic imaging; image processing; biometric recognition 3D imaging; ultrasound system; acoustic imaging; image processing; biometric recognition
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Iula, A.; Micucci, M. Experimental Validation of a Reliable Palmprint Recognition System Based on 2D Ultrasound Images. Electronics 2019, 8, 1393.

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