Home/ Questions/Q 9139281
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-06-17T09:22:02+00:00

I try again to do better my question (http://stackoverflow.com/questions/14349550/convert-image-in-a-binary-image-with-cv2-module-in-python) In this code (it’s a

  • 0

I try again to do better my question (http://stackoverflow.com/questions/14349550/convert-image-in-a-binary-image-with-cv2-module-in-python)

In this code (it’s a little bit changed from the first ) I can easily work with my converted binary image , extracting contours, calculating areas.. but it’s not again possible to execute this code line: cv2.imshow('gray_image',imgray).

it show me a total grey window and that’s all. I have to quit python because goes in loop.

imgray = cv2.cvtColor(im,cv2.COLOR_BGR2GRAY)
ret,thresh = cv2.threshold(imgray,127,255,0) 
contours, hierarchy = cv2.findContours(thresh, cv2.RETR_TREE,cv2.CHAIN_APPROX_SIMPLE)
print('oggetti trovati')
print(len(contours))
cnt = contours[0]
print(len(cnt))
cv2.imshow('gray_image',imgray)

What can I do?

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    Here you need to add cv2.waitKey() after cv2.imshow('gray_image',imgray). This function is for handling any window event like creating or showing an image in OpenCV.

    • 0