Python OpenCV 的基本命令“Cannot find reference in '__init__'.py

Question

While starting a new project, OpenCV just decided to stop working on my PC and laptop. I'm using Python 3.9. Basic commands like "imread" and "imshow" aren't working anymore. I've uninstalled and reinstalled Python and Pycharm. I've removed the module and reinstalled it... yet and it still won't function properly. This is an error I've never seen before.

import cv2 as cv

img = "Nemo.jpg"
cv.imread(img)
cv.imshow("feesh", img)

Traceback (most recent call last):
  File "C:\Users\ae\PycharmProjects\pythonProject1\main.py", line 5, in <module>
    cv.imshow("feesh", img)
cv2.error: OpenCV(4.6.0) :-1: error: (-5:Bad argument) in function 'imshow'
> Overload resolution failed:
>  - mat is not a numpy array, neither a scalar
>  - Expected Ptr<cv::cuda::GpuMat> for argument 'mat'
>  - Expected Ptr<cv::UMat> for argument 'mat'

Cannot find reference Actual error

Thanks!

Answer 1

I've also been having this issue with OpenCV 4.6.0.66. It's not a perfect solution, but you can roll back to an older version with pip install --force-reinstall --no-cache -U opencv-python==4.5.5.62 . There's more discussion/explanation here