CHEETAH 3G-SDI Camera
November 16, 2017
Page
29
of
53
Rev 1.1
Figure 21: Automatic exposure and automatic gain settings.
•
If AEC is selected, you cannot adjust exposure controls.
•
If AGC is selected, you cannot adjust gain controls.
Area
. Use the area controls to define an active Area of Interest (AOI). The camera
uses the image data inside the AOI to calculate the luminance for adjusting
exposure and gain parameters. The camera ignores brightness changes outside
of the AOI. Changes in the AOI luminance, as determined by the firmware, cause
changes in the exposure/gain and applies them to the entire image. In other
words, if the AOI luminance deviates from the target (limit), the exposure and/or
gain adjusts automatically to compensate.
Figure 22: AEC and AGC provide the same type of controls.
To define an Area:
1.
Select AEC, AGC, or both.
2.
Enter the AOI width/height and offset (X, Y) values in the up/down scroll
fields.
a.
X offset describes the starting column for the AOI window and
is the distance in pixels from the left side of the screen.
b.
Y offset describes the starting row for the AOI window and is
the distance in pixels from the top of the screen.
