How do I convert a numpy array to (and display) an image? How do I convert a numpy array to (and display) an image? python python

How do I convert a numpy array to (and display) an image?


The following should work:

from matplotlib import pyplot as pltplt.imshow(data, interpolation='nearest')plt.show()

If you are using Jupyter notebook/lab, use this inline command before importing matplotlib:

%matplotlib inline 

A more featureful way is to install ipyml pip install ipympl and use

%matplotlib widget 

see an example.


You could use PIL to create (and display) an image:

from PIL import Imageimport numpy as npw, h = 512, 512data = np.zeros((h, w, 3), dtype=np.uint8)data[0:256, 0:256] = [255, 0, 0] # red patch in upper leftimg = Image.fromarray(data, 'RGB')img.save('my.png')img.show()


Shortest path is to use scipy, like this:

from scipy.misc import toimagetoimage(data).show()

This requires PIL or Pillow to be installed as well.

A similar approach also requiring PIL or Pillow but which may invoke a different viewer is:

from scipy.misc import imshowimshow(data)


matomo