What is the different between opencv-python library and cv2 library?

Question

I am trying to use openCV. Normally, When I run command panel on desktop, I can see version of my openCV:

But when I couldn't import to my project. Normally, I was adding opencv-python library from interpreter but I builded cv2 library which version is 4.4.0 to use gpu. So I haven't got a opencv-python library at site-packages but I have cv2 file in site-packages. Unfortunately I couldn't import it to my project. How can I use this opencv version or file which name is cv2.cp37-win_amd64.pyd?

I can use all other libraries in site-packages. But when I couldn't add cv2 library. Here the a basic image read from file :

The interesting part of the problem is, all cv2 function cannot be found but program is working :D I am really confused.

Answer 1

cv2 is the module import name for opencv-python, "Unofficial pre-built CPU-only OpenCV packages for Python". The traditional OpenCV has many complicated steps involving building the module from scratch, which is unnecessary. I would recommend remaining with the opencv-python library.

The IDE probably doesn't recognize the cv2 commands because you are using a 64 bit version of opencv-python on a 32 bit version of Python or vice-versa. I believe this can be resolved by uninstalling your current OpenCV installation using pip uninstall opencv-python and then reinstalling it with the correct version following the linked tutorial.

Sources / Additional Links:
Install Tutorial: https://www.youtube.com/watch?v=Z78zbnLlPUA