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CD40047_R04_allPIXA_User-Manual.docx
162
Internal frame trigger
This function permits to use a brightness change as frame trigger instead of an external light
barrier. The camera starts or stops image acquisition if the medium brightness of pixels in a
specified ROI crosses a specified threshold. To activate the function, use the IO Configurator to
select the respective connector in the
Frame trigger / light barrier
section (see section 9.13):
To control behavior of the internal frame trigger, set the parameters
Triggered frame scan
and
Select trigger edge detection
accordingly.
The following graphic shows examples for threshold values for bright objects (in blue color) and
for dark objects (in green color):
11.9.5.1 ROI start
Name
Name
Internal LB ROI start
Function
Specified at which pixel the ROI starts
Channels
All
Unit
Integer
Dependency
Takes effect only if the internal frame trigger has been activated using the IO
Configurator.
Notes
The ROI, specified by
ROI start
and
ROI length
, must be completely within
the front or the rear tap. It must not cross the tap border.
Camera
Value
Lower limit
All
1
Upper limit
All
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