在ipython中使用matplotlib显示图像

Question

How can I display an image imported with numpy package using matplotlib in ipython?

It should be fairly easy with the command

import numpy as np
import matplotlib.pyplot as plt

im = np.array(Image.open('image.jpg'))

plt.imshow(im)

But the image does not show and I just get the output

<matplotlib.image.AxesImage at 0x7fb38e10ff10>

Answer 1

You must call plt.show() to actually bring up the windows. You can get around this by using interactive mode . But for scripts it is better to simply call show() after completing all your plotting commands.

Answer 2

In IPython or Jupyter notebooks, if you want to show images as inline in the notebook and not in a separate window, implement the code shown below.

import numpy as np
import matplotlib.pyplot as plt
%matplotlib inline

im = np.array(Image.open('image.jpg'))

plt.imshow(im)
plt.show()