FingerPrintScan System FPC 1381
– Technical Handbook
page 6
Version 2.00
8.
Definitions
Evaluation Unit (EU):
The evaluation unit is the controller of the fingerprint system FPC-1381. Hereafter
abbreviated as EU.
Intruder Detection System (IDS):
An IDS is a hazard detection system which recognises e.g. an intrusion into property
and as the case may be, the notification of a security firm by means of a transmitter.
False Rejection Rate (FRR):
The percentage of admissible users who were mistakenly not admitted by the
biometric system.
False Acceptance Rate (FAR):
The percentage of prohibited users who were mistakenly admitted by the biometric
system.
Minutiae:
Branches in the grooves, occlusions, crossovers, short lines as well as ends of
grooves are the characteristic structures in a fingerprint. These patterns are detected
wherever the grooves in the skin disperse or terminate. The points are named
minutiae.
Minutiae based process:
Comparison of the fingerprint (the current image) with a reference image (template)
for the determination of the following:
compliance with the accuracy of position
compliance with the type of minutiae
compliance with the direction of the minutiae
Characteristics:
Minimum number of minutiae:
15 minutiae
False Rejection Rate (FRR)
7-9.5%
False Acceptance Rate (FAR)
9*10
-6
= 0.0009%
Lock plate contact (LPC):
The device built into the lock plate, e.g. contact or sensor, through which the latch
activates the lock (Source VdS).
Template:
A template is a record of a fingerprint. This record also contains personal
identification numbers, finger numbers and minutiae.
Inevitability (IE):
A method which prevents an IDS which is not completely functional, from being
armed or an armed IDS from unintentionally being triggered by means of an external
or distant alarm. (Source VdS).
