instruction for extract openCV-examples (Python/CPP) on PD19.x phyCORE-i.MX 8M (Polaris):
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- turn on the system and authorized you, type "root"
- Play the "opencv_examples.tar" file into the ../root/ directory (e.g. via "WinSCP")
- Set attributes and unpack:
  <chmod 775 opencv_examples.tar>
  <tar -xvf opencv_examples.tar -C />

- change into path ../usr/share/phytec_opencv_examples
- start Weston/X11 server <systemctl start weston>
- change into path ../usr/share/phytec_opencv_examples/python for openCV examples with python
- change into path ../usr/share/phytec_opencv_examples/cpp for openCV examples in cpp