iPB4 Biometric Device Range
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Installation & User Guide
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Rev 07 ©2017-2018 iPulse Systems
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THE FINGERPRINT ENRO LLMENT PROCESS
Now that we understand the identifying features in fingerprints, let’s take a look at what happens behind
the scenes when a biometric template is constructed.
Note:
iPulse makes use of SecuGen’s optical sensor technology. For the purposes of this document,
explanations are based on the use of these particular devices.
Before we can proceed, we need a digital image of the fingerprint. When a finger is placed on the biometric
scanner’s touch plate, a visible light, commonly red, is shined on the fingerprint
through a clear prism. The
reflected light from the fingerprint is picked up by the optical sensor
(an optical biometric device is,
essentially, a highly-specialized digital camera)
in the device and a digital image is created.
Image enhancement
Image analysis
Binary processing
Thinning
Ridge reconstruction
Minutiae extraction
Figure 14 - Fingerprint Enrolment
Process
Содержание iPB4
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