My team is a java team, we are using UDP to communicate between the roboRIO and our Jetson (which will run python or c++ depending on how fast python is) for vision processing. I have not used Lab View, but I suspect that it is very likely to support UDP. If that is the case, you could have vision metadata sent to the c++ code from the labview computer and thus merge the two sets of data.
If you want to look at some example code, here is a link:
https://github.com/TheHighlanders/Ru...tifyTargets.py
My team is currently prototyping our vision code so it might not be the most clear and consise but it is working.