Videotec NXPTZ, Instruction Manual

Page: 49 / 414

Instruc
tion manual - English - EN
47 MNVCNXPTZT_1710_EN
9.1.12.1 Flat Field Correction Menu
The thermal camera is fitted with an internal
mechanism which periodically improves the quality
of the images: the Flat Field correction (FFC). The
parameters which manage this function are:
1.
Flat Field Auto: Enables the automatic
or manual Flat Field correction. When the
automatic correction is enabled, the camera
carries out a FFC after a given time or
temperature change. Vice versa, when the
manual correction is set, the FFC operations are
carried out when requested by the operator. We
advise setting the manual correction at all times.
2.
Interval:
Sets the time that has to elapse before
carrying out a FFC when the dynamic gain range
is High. The time interval is indicated in frames
(33ms for NTSC and 40ms for PAL).
3.
Low Gain Interval:
Sets the time that has to
elapse before carrying out a FFC when the
dynamic gain range is Low. The time interval is
indicated in frames (33ms for NTSC and 40ms for
PAL).
4.
Temperature:
Sets the temperature change
after which a FFC has to be carried out when the
dynamic gain range is High. The temperature
change is indicated in 0.1°C intervals.
5.
Low Gain Temperature:
Sets the temperature
interval after which a FFC has to be carried
out when the dynamic gain range is Low.
The temperature change is indicated in 0.1°C
intervals.
6.
Gain Mode:
Allows the setting of dynamic gain
range type:
•
High:
This setting aims to maximize the
contrast and is especially suitable for
applications which carry out the video
analysis of images.
•
Low:
This setting increases the dynamic range
of the image and diminishes the contrast. It is
especially suitable for identifying the hottest
elements in an image.
• Auto: This setting allows the camera to switch
between High and Low modes depending on
the type of image currently being displayed.
The parameters in the Gain Change Values
menu are used to change the behaviour of
this mode (9.1.12.2 Gain Switch Values, page
48).
7. Do FFC: Carries out a FFC.
8. Gain Switch Values: Allows access to the Gain
Switch Values submenu.
FLAT FIELD CORRECTION
------------------------
1>FLAT FIELD AUTO: Y
2 INTERVAL : 7200
3 LOW GAIN INTER.: 1350
4 TEMPERATURE : 5
5 LOW GAIN TEMP. : 10
6 GAIN MODE : AUTO
7 DO FFC?
8 GAIN SWITCH VALUES >
Fig. 80
We recommend that you do not change
the default values which have been set
to guarantee high quality images in any
operating condition.