Increase DPI of Matplotlib .show() in Jupyter Notebook

Question

I'm using Matplotlib in a Jupyter Notebook to display an image of a map. The code looks like this:

%matplotlib inline  imgpath = './map.png'  import matplotlib.pyplot as plt import matplotlib.image as mpimg import numpy as np  from PIL import Image  img = Image.open(imgpath) print(img.size)  width, height = img.size # img.thumbnail((width * 2,height * 2), Image.ANTIALIAS)  # resizes image in-place imgplot = plt.imshow(img) plt.savefig('test.png', dpi = 300) 

The problem is, although the plt.savefig('test.png', dpi = 300) looks fine (because I changed the dpi to 300), the image displayed in the notebook is so low resolution I can't make anything out on it, and plt.imshow(img, dpi = 300) doesn't work:

So what I'm wondering is if there is a way to change the resolution of the image shown in the Jupyter Notebook?

Answer 1

Add this at the beginning of the notebook:

import matplotlib as mpl mpl.rcParams['figure.dpi'] = 300 

That's it !

Answer 2

If your screen has Retina display, add the following line after %matplotlib inline (or somewhere else before plotting) in your notebook

%config InlineBackend.figure_format = 'retina' 

This will increase the display resolution of your plots within the Jupyter Notebook.