'Image is not displaying in Google Colab while using imshow()
I am working on a project which requires functions from OpenCV to plot images. I am trying to display image using the below code in Google Colab. But nothing shows up in the output. Can anybody help me with this?
%pylab notebook
import cv2
testim = imread('butterfly.jpg')
figure()
imshow(testim)
plt.show()
Screenshot:
Solution 1:[1]
The cv2.imshow() and cv.imshow() functions from the opencv-python package are incompatible with Jupyter notebook; see https://github.com/jupyter/notebook/issues/3935.
As a replacement, you can use the following function:
from google.colab.patches import cv2_imshow
For example, here we download and display a PNG image of the Colab logo:
!curl -o logo.png https://colab.research.google.com/img/colab_favicon_256px.png
import cv2
img = cv2.imread('logo.png', cv2.IMREAD_UNCHANGED)
cv2_imshow(img)
Credits: Code Snippets in Google Colab
Solution 2:[2]
Found one workaround. We can use %matplotlib inline in the code to use imshow. Used as example here in In[28] - link
Solution 3:[3]
imshow requires an X server, which isn't available in a web browser.
Instead, use the IPython.display.Image library. Here's an example:
https://colab.research.google.com/drive/1jWHKR6rhhyZtUulttBD6Pxd_AJhgtVaV
Solution 4:[4]
cv2.imshow()
does not work well in colab, you can use matplotlib for displaying.
import matplotlib.image as mpimg
from matplotlib.pyplot import imshow
%matplotlib inline
testim = mpimg.imread('butterfly.jpg')
imshow(testim)
or you can do colab's own cv2_imshow version
from google.colab.patches import cv2_imshow
cv2_imshow('butterfly.jpg')
Solution 5:[5]
Instead of using cv2.imshow() try this:
- Change the import to
from google.colab.patches import cv2_imshow - Replace
cv2.imshow()tocv2_imshow()
I tried it and it worked for me.
Solution 6:[6]
from google.colab.patches import cv2_imshow
image = cv2.imread("image.png")
# "image.png" is image path.
cv2_imshow(image)
Solution 7:[7]
I am also facing a same issue in google colab.
We can use cv2_imshow() instead of (cv2.imshow or cv.imshow):
#We must import first line of code
**#working module**
from google.colab.patches import cv2_imshow
#Replace cv2.imshow() to cv2_imshow()
img = cv.imread('tiger.jpg') #mentioning a path of an image
cv2_imshow(img)
#do not use below code it won't work for me also so i switch to above mentioned code to viewing an image
#non working module, error code mentioning for your references. import cv2 as cv img = cv.imread('tiger.jpg') #mentioning a path of an image cv.imshow(img)
Solution 8:[8]
You can use "import cv2 as cv" and do all the processing and while displaying image use
from google.colab.patches import cv2_imshow
cv2_imshow(image)
Sources
This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.
Source: Stack Overflow
| Solution | Source |
|---|---|
| Solution 1 | Ajai |
| Solution 2 | Alankrit |
| Solution 3 | Bob Smith |
| Solution 4 | Muhammad Zakaria |
| Solution 5 | Pratham |
| Solution 6 | ravindra |
| Solution 7 | Rabiyulfahim |
| Solution 8 | Sandhya Krishnan |