实验中用到了matplotlib，简单记录一下。

使用教程：https://matplotlib.org/users/pyplot_tutorial.html

例子：

from matplotlib.font_manager import FontProperties

font_set = FontProperties(fname=r"c:\windows\fonts\simsun.ttc", size=12)#使用中文需要

from PIL import Image    #Pillow图像库

import matplotlib.pyplot as plt

%matplotlib inline               #jupyter notebook内联显示

from PIL import ImageFilter  #Pillow 滤波

from PIL import ImageEnhance

img = Image.open("./XXX.tif")

plt.figure(figsize=(10,8),dpi=108) #

p1 = plt.subplot(221)

p2 = plt.subplot(222)

p3 = plt.subplot(223)

p4 = plt.subplot(224)

p1.imshow(img)

p1.set_title("原始图像",fontproperties=font_set)

imgEH = ImageEnhance.Contrast(img)

contrast = 1.5

image_contrasted = imgEH.enhance(contrast)

p2.imshow(image_contrasted)

p2.set_title("增强对比度",fontproperties=font_set)

enh_sha = ImageEnhance.Sharpness(img)

sharpness = 3.0

image_sharped = enh_sha.enhance(sharpness)

p3.imshow(image_sharped)

p3.set_title("锐化",fontproperties=font_set)

enh_bri = ImageEnhance.Brightness(img)

brightness = 1.5

image_brightened = enh_bri.enhance(brightness)

p4.imshow(image_brightened)

p4.set_title("亮度增加",fontproperties=font_set)

plt.show()