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

问题描述

我在 Jupyter Notebook 中使用 Matplotlib 来显示地图图像.代码如下所示:

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，虽然plt.savefig('test.png', dpi = 300)看起来不错(因为我把dpi改成300了)，但是notebook中显示的图片就是这样低分辨率我无法做出任何事情，并且 plt.imshow(img, dpi = 300) 不起作用:

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:

那么我想知道是否有办法更改 Jupyter Notebook 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?

推荐答案

在笔记本的开头添加:

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

就是这样！

这篇关于在 Jupyter Notebook 中增加 Matplotlib .show() 的 DPI的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！