OpenCV is great for classical computer vision, and Jupyter Notebooks are great for prototyping. It would make sense to use them both, but the “cv2.imshow” cannot work inside a Jupyter Notebook, since it requires handling an event loop. Okay, you can always convert back the image to a RGB Numpy array and show it using Matplotlib or maybe Pillow. I prefer to avoid the additional lines of code and mental context switch using a small neat package called “cv2-plt-imshow”.

pip install cv2-plt-imshow

Then, reading and showing image in the Notebook is as it should be!

import cv2
from cv2_plt_imshow import cv2_plt_imshow
img = cv2.imread("10000.jpg")
cv2_plt_imshow(img)

The documentation is here: https://pypi.org/project/cv2-plt-imshow/