User's Guide

427-0100-00-12 Version 110 April 2019 22
WARNING - EAR Controlled Technical Data
Operation
AGC ROI
The region of interest (ROI) determines what portion of the image is used by the Automatic Gain
Control (AGC) algorithm to make adjustments to the IR sensor parameters. 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.
A handle is shown in the corner of the ROI.
Drag the handle to change
the size of the ROI box.
Drag the ROI box over 
the portion of the scene 
that will control the AGC.
AGC
The AGC parameters control how the overall video image appears. Manua
l adjustments to the
Brightness and Contrast, in some cases may provide a more appealing image, depending on
personal preferences.
• Brightness (gamma)
setting determines the allocation of the 256 “shades of gray” produced by
the AGC. Values above 50 allocate more shades of gray to hotter objects, while values below 50
allocate more shades of gray to lower temperature objects. Range 0 to 100.
• Contrast (Max
Gain) can be used to increase contrast, especially for scenes with little
temperature variation (it may also increase noise due to increased gain). Range 0 to 100.
• Colorization p
alette provides a different representation of the detected levels of thermal energy
as colors or gray-scale values. White hot and black hot are gray scale palettes; other palettes
assign different colors to different temperatures.
• MSX provides a visible video overlay on the thermal stream to enhance
the image. This may be
helpful when setting up analytics detection zones.
Click Save to s
tore the current settings as power up defaults. To restore the original settings, click
Reset.