matplotlib.pyplot.imread()函数

Matplotlib是Python中的一个库，它是NumPy库的数值-数学扩展。Pyplot是一个基于状态的Matplotlib模块接口，该模块提供了一个类似matlab的接口。

matplotlib.pyplot.imread()函数:

matplotlib库pyplot模块中的imread()函数用于将图像从文件读入数组。

语法:matplotlib.pyplot.imread(fname, format=None)

参数:该方法接受以下参数。

• fname:要读取的镜像文件。
• format:该参数是读取数据时假定的图像文件格式。

该方法返回如下内容。

• imagedata:返回图像数据

下面的例子演示了matplotlib.pyplot.imread()函数在matplotlib.pyplot中的作用:

示例1

# Implementation of matplotlib function
import numpy as np
import matplotlib.cbook as cbook
import matplotlib.image as image
import matplotlib.pyplot as plt
  
with cbook.get_sample_data('loggf.png') as image_file:
    image = plt.imread(image_file)
  
fig, ax = plt.subplots()
ax.imshow(image)
ax.axis('off')
  
plt.title('matplotlib.pyplot.imread() function Example', 
                                     fontweight ="bold")
plt.show()

输出:

示例2

# Implementation of matplotlib function
import numpy as np
import matplotlib.cbook as cbook
import matplotlib.image as image
import matplotlib.pyplot as plt
  
  
with cbook.get_sample_data('loggf.png') as file:
    im = image.imread(file)
  
fig, ax = plt.subplots()
  
ax.plot(np.cos(10 * np.linspace(0, 1)), '-o', ms = 15,
                            alpha = 0.6, mfc ='green')
  
ax.grid()
fig.figimage(im, 10, 10, zorder = 3, alpha =.5)
  
plt.title('matplotlib.pyplot.imread() function Example', 
                                     fontweight ="bold")
plt.show()

输出: