Yes, you can install another OpenCV along with OpenVINO. The one from OpenVINO will not be used if you do not activate OpenVINO environment. setupvars.sh script just sets OpenCV_DIR, PATH, LD_LIBRARY_PATH and PYTHONPATH environment variables.
To check which OpenCV version have been loaded in Python, add following commands to your script:
I didn't run the setupvars.bat file because I also wanted my own version of opencv for my program. However, I now get the following error when trying to import inference_engine:
from .ie_api import *
ImportError: DLL load failed: The specified module could not be found.
If this post is still open, any help would be appreciated!