#Biometric fingerprint capture scanners skin
Some of the limitations of these scanners, which operate on optical or capacitive systems, include: non-linear distortions introduced by the elastic deformation of the skin during scans, irregular attributes associated with dry skin, diseases, sweat, dirt and humidity, security issues with latent fingerprints deposited on the scan plate after each use, which can be fraudulently replicated, and inconsistent pressures of the fingers during scans, amongst others, ,, , ]. Prior to the onset of the COVID-19 pandemic, however, efforts had been on-going towards the development of contactless fingerprint biometric scanners mainly because of the limitations of touch-based fingerprint scanners. This drawback is especially accentuated, now, in the wake of the recent emergence of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Fingerprint biometrics is one of the most widely used forms of recognition for the purposes of identification and authentication due to its convenience, reliability and accuracy but it is also one of the most susceptible agents of transmission for contagious infections. There is an urgent and growing need, in today's rapidly changing and disease-prone world, for non-contact biometric authentication devices to aid hygiene and safety, and mitigate the spread of contagious infections. Additionally, a convenient contactless fingerprint acquisition process is reinforced through a unique architectural design. A high-precision fingerprint pattern recognition of up to 97.51% correlation factor has been achieved, using this contactless method, by varying the background illuminating light and implementing two-dimensional imaging techniques and near-constant resolution. Herein, these constraints are tackled by implementing a system that enables the positioning of the target finger(s) at fixed vertical and horizontal distances away from the camera lens without the physical contact of the fingers with the device framework during scanning.
Current approaches to contactless fingerprinting scanners suffer limitations ranging from poor compatibility with two-dimensional equivalent touch-based fingerprint images to perspective distortions, inconstant resolution, motion blur images and low correlation factors.
The raging COVID-19 pandemic accentuates the urgent and compelling need for non-contact fingerprinting biometric authentication devices to mitigate the transmission of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and other contagious infections.