Opencv Errror even though installed

Code Help Python
1

Question:
I am unable to get opencv-python to work on REPL.it even though the packages are showing as installed. Receiving the following error:
File “/home/runner/OptimisticProudGenerics/venv/lib/python3.8/site-packages/cv2/init.py”, line 109, in load_first_config
raise ImportError(‘OpenCV loader: missing configuration file: {}. Check OpenCV installation.’.format(fnames))
ImportError: OpenCV loader: missing configuration file: [‘config.py’]. Check OpenCV installation.

any suggestions?

My test code looks like the following:

import cv2
import pathlib

# Step 0: Read Image from a file
file = pathlib.Path(__file__).parent.resolve() / input("Enter image name in same directory: ")
image1 = cv2.imread(str(file))

# Shows image on the screen until any button is pressed then closes windows
cv2.imshow('Hit any key to continue',image1)
cv2.waitKey(0)
cv2.destroyAllWindows()

# Step 1: Convert to Grey Image. Using cvtColor function of OpenCV. 
grey_img = cv2.cvtColor(image1, cv2.COLOR_BGR2GRAY)

# Step 2: Invert Image. 
invert = cv2.bitwise_not(grey_img)

# Step 3: Blur image.
blur = cv2.GaussianBlur(invert, (21, 21), 0)

# Step 4: Invert Blurred Image.
invertedblur = cv2.bitwise_not(blur)

# Step 5: Convert to Sketch. 
sketch = cv2.divide(grey_img, invertedblur, scale=256.0)

# Step 6: Save Sketch. Read back in to verify saved file
filesave = file.with_name(str(pathlib.Path(file).stem) + '-sketch.jpg')
cv2.imwrite(str(filesave), sketch)
image = cv2.imread(str(filesave))

# Step 7: Display sketch.
cv2.imshow('Hit any key to exit', image)
cv2.waitKey(0)
cv2.destroyAllWindows()
2

Welcome to the community! I’m not familiar with this particular Python module but it appears that your installation of it may be corrupted. Try the following:
In shell, run poetry remove cv2; poetry add cv2.
If that doesn’t work, try pip install cv2.

1 Like
3

CoderElijah, Thank you for your suggestion. I have already done those things, both in the terminal and using the GUI package manager, as well as letting the template auto-install upon seeing the “import opencv-python” line in the code.

I did find an old thread that has a working solution, but it still needs addressing by the REPL team. If I fork a very old project with opencv, the fork will work. Any project created with recent templates fails.

4

Would you mind including the link to that thread since it solved your problem?

5

Sorry for me not being a big help but welcome to replit ask @MarkFuller. Hope you enjoy your time with us.

6

It will take me a while to find the discussion thread as I don’t have that handy. The discussion said to fork the following REPL that was an opencv example.

https://replit.com/@Frankwin/openCv-tutorial?v=10

If I fork that REPL, delete all the code, and then paste all of my code inside, it works correctly.
If I start a new REPL it fails with an opencv configuration error.
I have let the “import opencv” auto install, but errors…
I have used GUI package manager to remove and reinstall opencv-python but it errors.

The only working solution has been to fork that old project, and hope that the old project never disappears.

Regards,
Mark
I have used terminal and “pip install opencv-python” but still errors

7

For anyone else encountering this issue, you could try downgrading OpenCV version:

pip install opencv-python==4.5.3.56

If the OpenCV package gets forecfully updated during installation of other packages, you can simply re-run the pip install command above.

1 Like