Flat Field Correction Menu - Videotec MAXIMUS MVXT Manuel D'instructions

6.1.4.4 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. Do FFC: Carries out a FFC.
2. 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.
3. High Gain 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).
4. 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).
5. High Gain 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.
6. 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.
18
7. 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 (6.1.4.5 Gain Switch
Values, page 19).
8. Gain Switch Values: Allows access to the Gain
Switch Values submenu.
FLAT FIELD CORRECTION FLAT FIELD CORRECTION
------------------------ ------------------------
1>DO FFC? 1>DO FFC?
2 FLAT FIELD AUTO: 2 FLAT FIELD AUTO:
3 HIGH GAIN INT. : 3 HIGH GAIN INT. :
4 LOW GAIN INTER.: 4 LOW GAIN INTER.:
5 HIGH GAIN TEMP.: 5 HIGH GAIN TEMP.:
6 LOW GAIN TEMP. : 6 LOW GAIN TEMP. :
7 GAIN MODE 7 GAIN MODE
8 GAIN SWITCH VALUES 8 GAIN SWITCH VALUES
Fig. 23
We recommend that you do not change
the default values which have been set
to guarantee high quality images in any
operating condition.
N N
Y Y
7200 7200
1800 1800
5 5
5 5
: : AUTO AUTO
> >
MNVCMVXTCAM_2121_EN