User Guide

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Operation
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427-0300-00-12 - Revision 110 - May 2021
3.5 Thermal Image Setup - Thermal Page
In most installations, it is not necessary to change the default settings of the thermal sensor. However, in
some situations, depending on weather, time of day, or scene, modifying one or more parameters can
improve the video stream image. Be aware that, when the conditions change, the parameters might need
to be adjusted again. It is also a good idea to know how to restore the factory default settings (see
Firmware & Info Page).
AGC ROI
The camera's Automatic Gain Control (AGC) algorithm adjusts the thermal video according to the region
of interest (ROI). By default, the ROI is Full screen; the camera's AGC algorithm considers the entire
image. In some cases, defining an ROI that excludes a portion of the screen can improve the image. For
example, the sky is generally very cold. Defining the ROI to exclude the sky might improve contrast in the
rest of the image.
In addition to Full screen, you can select from a number of preset options or manually define the ROI by
selecting Custom.
By default, Show AGC ROI is selected and the AGC ROI appears as an overlay in the live video on the
camera web page. The AGC ROI overlay does not appear in the video stream itself.
Tip
When Show AGC ROI is selected, the mouse pointer is used to define the AGC ROI and it is not
possible to pan or tilt the camera. To use the mouse pointer to pan and tilt the camera, clear Show
AGC ROI or close the thermal settings panel.