Fingerprints are uniquely detailed, durable over an individual's lifetime, and difficult to alter. Due to the unique combinations, fingerprints have become a means of identification.

Types of fingerprint scanners

There are four types of fingerprint scanners:
# Optical scanners take a visual image of the fingerprint using a digital camera.
# Capacitive or CMOS scanners use capacitors and thus electric current to form an image

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