Standard Features AW00097603000
182 Basler aviator GigE
10.7.6 Exposure Auto
Exposure Auto is the "automatic" counterpart to manually setting the Exposure Time Abs
parameter. The exposure auto function automatically adjusts the Exposure Time Abs parameter.
within set limits until a target average gray value for the pixel data from the related Auto Function
AOI is reached.
The exposure auto function can be operated in the "once" and continuous" modes of operation.
If the related Auto Function AOI does not overlap the Image AOI (see the "Auto Function AOI"
section), the pixel data from the Auto Function AOI will not be used to control the exposure time.
Instead, the current manual setting for the Exposure Time Abs parameter will control the exposure
time.
The exposure auto function and the gain auto function can be used at the same time. In this case,
the auto function profile feature also takes effect. By default, the auto function profile feature
minimizes gain.
When trigger width exposure mode is selected, the exposure auto function is not available.
For more information about
setting the exposure time "manually", see Section 7.5 on page 86.
the trigger width exposure mode, see Section 7.4.3.2 on page 82.
about the auto function profile Section 10.7.8 on page 185.
The limits within which the camera will adjust the Auto Exposure Time Abs parameter are defined
by the Auto Exposure Time Abs Upper Limit and the Auto Exposure Time Abs Lower Limit
parameters. The current minimum and the maximum allowed settings for the Auto Exposure Time
Abs Upper Limit parameter and the Auto Exposure Time Abs Lower Limit parameters depend on
the minimum allowed and maximum possible exposure time for your camera model.
The Auto Target Value parameter defines the target average gray value that the exposure auto
function will attempt to achieve when it is automatically adjusting the Exposure Time Abs value. The
target average gray value can range from 50 (black) to 205 (white) when the camera is set for 8 bit
output. When the camera is set for 12 bit output, the target gray value can range from 800 to 3280.
Note that on cameras delivered from the factory, all auto functions will become
disabled whenever you power on or reset the camera.
If you load the auto functions factory set as the default configuration set and the
default configuration set is designated as the "startup" set, by default the exposure
auto function is enabled.
To change this behavior, you must change the configuration set settings. For more
information about configuration sets, see Section 10.19 on page 254.
If the Exposure Time Abs Upper Limit Parameter is set to a sufficiently high value,
the camera’s maximum allowed frame rate may be decreased.
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