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Python openCV drawing functions does not work?!

asked 2014-06-11 12:55:41 -0500

Hi, today I tried to draw a line in a window, this is the code I used.

import numpy as np import cv2

Create a black image

img = np.zeros((512,512,3), np.uint8)

Draw a diagonal blue line with thickness of 5 px


The problem is that when I run this, I get no errors and the Shell comes up and start running but the window to show the video never pops up or anything, nothing happens. Am I missing some plugin or something that I need to run this?

I got OpenCV and Matplotlib installed for Python.

Heelp please! =(

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answered 2014-07-11 14:14:43 -0500

li8bot gravatar image

Actually I had the same problem.All you need to do is img = np.zeros((512,512,3), np.uint8) img1= cv2.line(img,(0,0),(511,511),(255,0,0),5)

Thats it..renaming the variable for line does the trick.Now you can use imshow to display the image. Do visit my blog li8bot for further info on opencv with python

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Asked: 2014-06-11 12:55:41 -0500

Seen: 768 times

Last updated: Jul 11 '14