Dual Vision Light Load Thermal PTZ
User Manual
Thermal Parameter Configuration
49
Issue V1.0 (2019-04-03)
Table 5-3
FFC mode parameter description
Parameter
Description
Configuration
Method
FFC Mode
The thermal imaging camera contains a mechanical
correction actuator to periodically improve image
quality. This actuator is called flat field correction
(FFC). During the control of FFC, the flat field shield
blocks the sensor array, enabling each part of the
sensor to collect consistent temperature field (flat
field). Through FFC, the camera updates the revision
coefficient and thus generates more consistent image.
In the course of FFC, video image is frozen for two
seconds to show a static frame screen and
automatically restored after the correction. Repeating
FFC will avoid image particulate-like sense and quality
deterioration. When camera temperature changes, FFC
is of particular importance. For example, when the
camera is started up or ambient temperature changes,
FFC must be executed immediately.
Auto
: In auto FFC mode, the camera will
automatically execute FFC in case that temperature
change exceeds specified amount or the specified time
interval expires, whichever is earlier. FFC interval
range: 5~30 min. The camera temperature change
amount is subject to the set value for the detector
collecting internal temperature. During camera startup,
camera temperature changes dramatically, so FFC will
be performed repeatedly, which is a normal
phenomenon.
Manual
: In manual FFC mode, the camera will not
automatically execute FFC in case of temperature
change or the specified time interval is up. Select
manual FFC and click
Trigger Baffle Correction
. If
image quality is obviously deteriorated but FFC is not
automatically executed, manually execute FFC to
improve image quality.
External
: In external FFC mode, the mechanical
correction actuator will stop and a unified source
(black object) is set in front of the camera. The internal
FFC will not resolve image deterioration that is caused
by lens or lens base inconsistency. The external FFC
function will be very useful. In actual operation,
customers find that a hand palm or desk surface with
constant temperature can be used as a substitute of the
black object to perform external FFC.
[Configuration
method]
Select from the
drop-down list
[Default value]
Auto
