Roi; Agc; Scene Presets; Digital Detail Enhancement (Dde) - FLIR Nexus Configuration Manual

3 Advanced Configuration
3.1.1
The camera adjustments under the ROI
heading allow the user to make changes
to the Region Of Interest. The ROI
determines what portion of the image is
considered by the Automatic Gain
Control (AGC) algorithm. By default all of
the pixels in the image are considered;
in some cases it may provide an
improved image if a portion of the image
is excluded. For example, the sky is
generally very cold, so if the ROI excludes the sky it may add more contrast to the rest of the image. A
pull-down list offers some convenient options.
3.1.2
The AGC parameters affect how the overall video image appears. The default Plateau algorithm is
suitable for most installations, but in some cases one of the other selections may provide a more
appealing image, depending on personal preferences. Be aware the settings that are optimal at one
time may be less optimal a short time later, since conditions such as weather and time of day affect
the image and are constantly changing.
Experiment with different AGC modes
to find the settings that work best for the
particular installation (it may be best to
start with the Scene Presets options,
see below). It is always possible to
return to the default settings by
selecting the Factory Defaults button at
the bottom of the page.
With the Plateau mode, the ITT Mean parameter will effect overall brightness, and the Max Gain
parameter can generally be used to increase contrast (although it may also increase noise due to
gain).
3.1.3
Each Scene Preset provides a
combination of AGC and Digital
Detail Enhancement (DDE, see
below) parameters that are preferred
for certain types of conditions. Select
a preset that provides an image that
is optimal for the installation.
3.1.4
DDE is an image processing technique that enhances details by emphasizing lines and edges.
Increasing the DDE setting may make it possible to see fine details more easily, but it could also make
the image somewhat more grainy or pixilated.
427-0030-00-28 Version 110

ROI

AGC

Scene Presets

Digital Detail Enhancement (DDE)

Jun 2013 3-2