Python openCV: Cannot show an image

Question

I'm using python opencv and I'm trying to import an image and show it but I get the following error:

import numpy as np
import cv2
img = cv2.imread('messi5.jpg',0)
cv2.imshow('image',img)
OpenCV Error: Assertion failed (size.width>0 && size.height>0) in cv::imshow, fi
le C:\builds\master_PackSlaveAddon-win64-vc12-static\opencv\modules\highgui\src\
window.cpp, line 271
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
cv2.error: C:\builds\master_PackSlaveAddon-win64-vc12-static\opencv\modules\high
gui\src\window.cpp:271: error: (-215) size.width>0 && size.height>0 in function

Looks like image is corrupted. Did you try to open it in another app (some viewer for example)? — kvorobiev
– kvorobiev, Commented Sep 7, 2015 at 13:27
@kvorobiev Yes. I've uploaded the image if you want to test it. — zinon
– zinon, Commented Sep 7, 2015 at 13:33
Try to execute type(img) after img = cv2.imread('messi5.jpg',0) and post result — kvorobiev
– kvorobiev, Commented Sep 7, 2015 at 13:43

Rahul K P · Accepted Answer · 2015-09-07 16:21:16Z

3

In [1]: a = None
In [2]: type(a)
Out[2]: NoneType
In [3]: import cv2
In [4]: img = cv2.imread('messi.jpg',0)
In [5]: type(img)
Out[5]: numpy.ndarray
In [6]: img = cv2.imread('messii.jpg',0)
In [7]: type(img)
Out[7]: NoneType

Here your type of img is NoneType. So,It's problem with the miss spell or not existing of the image. Please check the spelling or existing of file.

answered Sep 7, 2015 at 16:21

Rahul K P

16.2k4 gold badges40 silver badges56 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

S Nagendra · Accepted Answer · 2021-08-04 07:23:22Z

0

please make sure your image file paths and img_names(existed) should be corrects as well as imread() object results shouldn't be nonetype and then

cv2.imshow('image', img)  
cv2.waitkey(0)

then your image can display

answered Aug 4, 2021 at 7:23

S Nagendra

594 bronze badges

Collectives™ on Stack Overflow

Python openCV: Cannot show an image

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related