GANZ ZNT8-BA1Fxx-T Thermal Network Camera
User Manual
Precautions
Issue V1.0 (2016-02-22)
27
Table 5-2 describes the FFC mode parameters.
Table 5-2
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
