Basler A504k User Manual

Basic Operation and Features
3-26 Basler A500k Series
PRELIMINARY
3.4 Long Exposure Compensation (A504k/kc Only)
The long exposure
compensation value can be set
to optimize image quality. The
longer the exposure time, the
higher the long exposure
compensation needs to be. The
long exposure compensation
value determines the reset
voltage which is applied to the
pixels between two images to
achieve full and uniform
discharge.
If the long exposure compen-
sation is too low at a long expo-
sure time, the image shows
photo response non-uniformity
(PRNU).
If the long exposure compensation is too high at a short exposure time, the dynamic range and
the sensitivity are reduced.
Set the long exposure compensation manually according to the following formula or according to
Table 3-1:
1997 ≤ exposure time ≤ 20000: Long Exposure Compensation = ( Timer1 - 1997 ) * ( 90 / 18003 ) + 70
(rounded to the next integer value)
You can set long exposure compensation using either the Camera Configuration Tool Plus (see
Section 4.1) or binary commands (see Section 4.2).
Exposure time* [µs]
Long exposure
Commpensation
20000 160
15000 135
10000 110
8000 100
4000 80
2000 70
Timer 1 determines the exposure time in programmable
and free-run mode. The exposure time is determined by
ExSync in edge-controlled and level-controlled mode.
Table 3-1: Long Exposure Compensation Sample Values
Long Exposure Compensation
Exposure time [µs]
(Timer 1 / ExSync)
70
160
1997 20000
Figure 3-24: Long Exposure Compensation

Basler A504k Specifications

General

Brand	Basler
Model	A504k
Category	Security Camera
Language	English