Backlight Compensation - Basler DART BCON SERIES User Manual

AW00136902000

11.12 Backlight Compensation

The Backlight Compensation feature will only take effect if the gain auto function
or the exposure auto function or both are enabled. For more information about
auto functions, see Section 11.11 on
If a bright light comes from behind your image subject, the subject may be underexposed and
appear silhouetted. The Backlight Compensation feature allows the camera to compensate for this
underexposure.
You can adjust the backlight compensation by setting the value of the AutoBacklightCompensation
parameter. The parameter value can range from 0 to 0.5.
When the AutoBacklightCompensation parameter value is set, a given percentage of the brightest
pixels in the image (i.e. the pixels with the highest pixel values) will not be taken into account for the
target value calculations. These calculations are performed by the gain auto function and the
exposure auto function (see Section 11.11.3 on
For example, if you set the parameter value to 0.3, then 30 % of the brightest pixels in the image
will not be taken into account for the target value calculations.
This allows the camera to properly expose the darker regions of the image.
You can set the backlight compensation from within your application software by using the pylon
API. The following code snippets illustrate using the API to set the AutoBacklightCompensation
parameter value:
// Set the AutoBacklightCompensation parameter value to 0.3
camera.AutoBacklightCompensation.SetValue(0.3);
Basler dart BCON
page 110.
page 116 and Section 11.11.4 on
Features
page 117).
121