How to show numpy 2d array as grayscale image in Jupyter Notebook?

Question

I have numpy array with the following properties.

np.shape(I)
(300, 300)

np.min(I)
115

np.max(I)
250

Unfortunately, when I plot it, I get something greenish bluish.

How to get normal grayscale palette?

See also https://stackoverflow.com/questions/36532390/how-to-avoid-automatic-pseudo-coloring-in-matplotlib-pyplot-imshow and https://stackoverflow.com/questions/3823752/display-image-as-grayscale-using-matplotlib . — Warren Weckesser, Jun 27 '18 at 13:57

score 9 · Accepted Answer · answered Jun 27 '18 at 13:46

9

Try this one:

imgplot = plt.imshow(I, cmap='gray')

answered Jun 27 '18 at 13:46

Bogdan Osyka

1 Answers1