opencv-tutorial
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Small improvements
Add instruction how to install opencv
Fix part_4.py for modern opencv.
@wb-08 Yes, you are right, but there is only one requirement, so in my opinion the easiest way is to install opencv directly
@nagayev , when you install opencv directly, then it installs the newest version of the library. And there is a chance that something will change in the new version again. And you can also please write a more specific version of opencv using ==
@wb-08 Yes, you are right, but installing direct version of any heavy package like opencv makes your hard-drive unhappy. I think the best way is installing opencv of certain range. E.g <5.0, because 5.0 is the next major release.