IDEMIA DOCUMENT
– REPRODUCTION AND DISCLOSURE PROHIBITED
Fingerprint Capture Basics 1/3
293732943-F
23
Region of Interest
Recommended Fingers
Acquisition troubleshooting
Area containing
the maximum
information
The biometric sensor
is designed to capture
the most useful area
of the fingerprint,
which is usually at the
centre of the finger
tip, as shown on the
figure above.
The sensor can capture any finger,
but we recommend to :
• use Fore finger / Index as 1
st
choice
• use middle finger as 2
nd
choice
• use ring finger as alternative 2
nd
choice (3
rd
choice)
• avoid little finger (poor fingerprint)
• avoid thumb (best accuracy but
ergonomically more difficult to use)
St
ep
s
ev
en:
c
apt
ure
bas
ic
s
2
Fore Finger
Ring Finger
1
3
Fingerprint image too dark :
the finger is probably too moist and/or
too dusty
too moist : dry the finger
too dusty: clean up the finger
Fingerprint image too light :
the finger is probably too cold and/or too
dry
too cold : warm up the finger
too dry : moisten the finger (i.e. with
moistening pad) and /or warm it up.
Finger to capture
the fingerprint area must be free of
any occlusion (if not, select another
finger to capture, such as the 2
nd
enrolled finger in case of
authentication or identification)
do not press or tense finger to avoid
blood vessels constriction.
For handling large scale enrollments please contact your IDEMIA representative for training and services options
Middle Finger
