Remove Parameter Limits - Basler acA2040-55 User Manual

AW00123409000
7.4

Remove Parameter Limits

For each camera feature, the allowed range of any associated parameter values is normally limited.
The factory limits are designed to ensure optimum camera operation and, in particular, good image
quality. For special camera uses, however, it may be helpful to set parameter values outside of the
factory limits.
The remove parameter limits feature lets you remove the factory limits for parameters associated
with certain camera features. When the factory limits are removed, the parameter values can be set
within extended limits. Typically, the range of the extended limits is dictated by the physical
restrictions of the camera's electronic devices, such as the absolute limits of the camera's variable
gain control.
The values for any extended limits can be determined by using the Basler pylon Viewer or from
within your application via the pylon API.
Parameter limits can be removed for the following parameters:
Gain parameter for setting gain (remove parameter limits generally available)

ExposureTime (remove parameter limits available for some camera models)

When the regular parameter limits on the Gain parameter are removed the new limits are set
beyond the regular ones, where the new lower limits can be set to negative values.
For more information about the gain feature, see Section 7.2 on
Removing Parameter Limits
To remove the limits for a parameter value:
1. Use the Parameter Limits Selector to select the parameter whose limits you want to remove.
2. Set the value of the Remove Parameter Limits parameter.
You can set the Parameter Limits Selector and the value of the Remove Parameter Limits
parameter from within your application software by using the Basler pylon API. The following code
snippet illustrates using the API to set the selector and the parameter value:
// Select the feature whose factory limits will be removed.
camera.RemoveParameterLimitSelector.SetValue(RemoveParameterLimitSelector_Gain);
// Remove the limits for the selected feature.
camera.RemoveParameterLimit.SetValue(true);
You can also use the Basler pylon Viewer application to easily set the parameters. Note that the
remove parameter limits feature will only be available at the "guru" viewing level.
For more information about the pylon API and the pylon Viewer, see Section 3.1 on
Basler ace USB 3.0
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