在Jupyter Notebook中增加Matplotlib .show()的DPI [英] Increase DPI of Matplotlib .show() in Jupyter Notebook

问题描述

我正在Jupyter笔记本中使用Matplotlib来显示地图图像.代码如下:

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)

问题是，尽管plt.savefig('test.png', dpi = 300)看起来不错(因为我将dpi更改为300)，但笔记本中显示的图像分辨率太低，无法对其进行任何显示，而plt.imshow(img, dpi = 300)却没有工作:

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:

所以我想知道是否有办法更改Jupyter笔记本中显示的图像的分辨率?

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

非常感谢Alex

答案:

Politinsa建议我将其添加到文件的开头:

Politinsa suggested I add this to the beginning of the file:

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

它可以解决问题.

推荐答案

将此内容添加到笔记本的开头:

Add this at the beginning of the notebook:

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

就是这样！

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