92
1.18.1 Introducing acquisition / recording possibilities
There are several use cases concerning the acquisition / recording possibilities of the camera:
• Generating very long exposure times (p. 92)
• Using Video Stream Recording (p. 93)
1.18.1.1 Generating very long exposure times
Since
mvIMPACT Acquire 1.10.65
Very long exposure times are possible with mvBlueFOX. For this purpose a special trigger/IO mode is used.
You can do this as follows (pseudo code):
TriggerMode = OnHighExpose
TriggerSource = DigOUT0 - DigOUT3
Attention
In the standard mvBlueFOX DigOUT2 and DigOUT3 are internal signals, however, they can be used for
this intention.
Note
Make sure that you adjust the ImageRequestTimeout_ms either to 0 (infinite)(this is the default
value) or to a reasonable value that is larger than the actual exposure time in order not to end up with
timeouts resulting from the buffer timeout being smaller than the actual time needed for exposing, trans-
ferring and capturing the image:
ImageRequestTimeout_ms = 0 # or reasonable value
Now request a single image:
imageRequestSingle
Then the digital output is set and reset. Between these two instructions you can include source code to get the
desired exposure time.
# The DigOUT which was chosen in TriggerSource
DigitalOutput
*
pOut = getOutput(digital output)
pOut->set();
# Wait as long as the exposure should continue.
pOut->reset();
Afterwards you will get the image.
If you change the state of corresponding output twice this will also work with wxPropView (p. 68).
MATRIX VISION GmbH
To Next Page
Loading...
Need help?
General
