Exposure Auto - Basler GIGE VISION ace acA640-100gm/gc Manual

Standard Features

10.10.3 Exposure Auto

Exposure Auto is the "automatic" counterpart to manually setting theExposure Time Abs parameter.
The exposure auto function automatically adjusts the Exposure Time Abs parameter value within
set limits, until a target average gray value for the pixel data from Auto Function AOI1 is reached.
The exposure auto function uses Auto Function AOI1 and can be operated in the "once" and
continuous" modes of operation.
If Auto Function AOI1 does not overlap the Image AOI (see the "Auto Function AOI" section) the
pixel data from Auto Function AOI1 will not be used to control the image brightness. Instead, the
current manual setting of the Exposure Time Abs parameter value will control the image brightness.
The exposure auto function is not available, when trigger width exposure mode is selected.
When the exposure auto function is used, the gain auto function can be used at the same time. In
this case, however, you must also set the auto function profile feature.
For more information the Exposure Time Abs parameter and related limitations, see Section 6.11
on page 96.
For more information about exposure modes and how to select them, see Section 6.4.3 on
For more information about the auto function profile feature, see Section 10.10.4 on
To use the exposure auto function, carry out the following steps:
1. Make sure trigger width exposure mode is not selected.
2. Select Auto Function AOI1.
3. Set the position and size of Auto Function AOI1.
4. Set the lower and upper limits for the Exposure Time Abs parameter value.
5. Set the target average gray value.
6. If necessary, set the auto function profile.
7. Enable the exposure auto function by setting it to "once" or "continuous". You must choose the
"continuous" setting when using the auto function profile.
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The exposure auto function will not work if the camera's exposure mode is set to
trigger width. For more information about the trigger width exposure mode, see
Section 6.4.3.2 on page
If the Auto Exposure Time Abs Upper Limit parameter is set to a sufficiently high
value the camera's frame rate may be decreased.
65.
page 64.
page 176.
Basler ace