OP200 Quick Start Guide
48
Not Flat Not Centered Not Centered
3) Getting Good Fingerprint Images
The quality of fingerprint images is relative to the number of minutiae points
captured by the fingerprint sensor. Fingerprint images not possessing an
adequate number of minutiae points may be unreadable. For those few users
whose fingerprint images lack sufficient minutia points and cannot be read by
the fingerprint sensor, it’s advised to issue those few users an RFID card (or fob)
or issue them a secret PIN code, instead.
Figure A-2 shows poor-quality fingerprints, characterized by smudged, faded
or otherwise distorted areas on the fingerprint. These conditions can be
caused by excessive dryness or wetness, excessive or insufficient pressure, or
scarring of the skin at the fingertip.
Figure A-2
DRY WET SCARRED
4) Correcting wet or dry fingerprint images
When the temperature is very cold or just after washing hands, fingerprints
often become very dry. In this case, the user should “moisturize” their
fingerprint simply by breathing on the fleshy pad of their fingertip prior to
placing their finger on the sensor. Another way to “moisturize” their fingerprint
is by gently rubbing their fingertip against their face or forehead for a second.
The moisture from their breath or skin oil should improve the recognition of
their fingerprint.
Conversely, too MUCH moisture can make it difficult to obtain a good
fingerprint image, no differently than adding too much ink to a stamp creates
a blurred image. To remedy having too much moisture, simply swipe the
finger on a clean dry lint-free cloth.
Summary of Contents for OP-200
Page 1: ...OP200 Quick Start Guide 1 QUICK START GUIDE Applicable Model OP 200 Version 1 2 Date May 2019 ...
Page 9: ...OP200 Quick Start Guide 6 1 5 Ethernet Connection LAN Connection ...
Page 12: ...OP200 Quick Start Guide 9 1 8 Standard Installation TCP IP Wiegand OSDP ...
Page 34: ...OP200 Quick Start Guide 31 4 Complete the installation ...
Page 36: ...OP200 Quick Start Guide 33 2 Display the certificate settings 3 Add the server exception ...
Page 41: ...OP200 Quick Start Guide 38 ...
Page 48: ...OP200 Quick Start Guide 45 ...
Page 49: ...OP200 Quick Start Guide 46 The following figure shows enroll fingerprint successfully ...