读取和写入大象

读取和写入图像

import numpy as np
import matplotlib.pyplot as plt

原始图像

plt.figure()
img = plt.imread("../../../data/elephant.png")
plt.imshow(img)

<matplotlib.image.AxesImage object at 0x7f7912343200>

以灰色显示红色通道

plt.figure()
img_red = img[:, :, 0]
plt.imshow(img_red, cmap="gray")

<matplotlib.image.AxesImage object at 0x7f791f6b3b00>

较低分辨率

plt.figure()
img_tiny = img[::6, ::6]
plt.imshow(img_tiny, interpolation="nearest")

plt.show()