opencv.imshow will cause jupyter notebook crash

Question

I check other question on google or stackoverflow, they are talking about run cv2.imshow in script, but my code run in jupyter notebook.

Here is my configuration:

1. ubuntu 16.4x64

2. python 3.5

3. opencv 3.1.0

I start a jupyter notebook: here is the code I put it notebook:

%pylab notebook import cv2  cvim2disp = cv2.imread('data/home.jpg') cv2.imshow('HelloWorld', cvim2disp) cv2.waitKey() #image will not show until this is called cv2.destroyWindow('HelloWorld') #make sure window closes cleanly 

When I execute these code. image will show in a pop up window, but I can not close this window by clicking the x on the top right corner, and a moment later, system will prompt me that the window is not responding, it will give me 2 choices: "wait" , "fore quit". if I hit wait, then It will show the same prompt later, If I hit 'fore quit', then the jupyter notebook kernel die and I have to start over.

I google around, many solution suggest that I should add this code

cv2.startWindowThread() 

before imshow, but situation get worse, the kernel hang forever!. anybody have some idea what's going on.

Here is the pic of my error:

Answer 1

%matplotlib inline #The line above is necesary to show Matplotlib's plots inside a Jupyter Notebook  import cv2 from matplotlib import pyplot as plt  #Import image image = cv2.imread("input_path")  #Show the image with matplotlib plt.imshow(image) plt.show()