Reading and writing an elephant

Read and write images

import numpy as np
import matplotlib.pyplot as plt

original figure

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

<matplotlib.image.AxesImage object at 0x7f093503db50>

red channel displayed in grey

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

<matplotlib.image.AxesImage object at 0x7f0935626710>

lower resolution

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

plt.show()