计算机视觉（一）
计算机rgb图片（https://baike.baidu.com/item/RGB/342517?fr=aladdin）
#coding:utf-8
import matplotlib.pyplot as plt
import matplotlib.image as mpimg
rgb_img = mpimg.imread("./imgs/7.jpg");
plt.figure
f,(a1,a2,a3,a4) = plt.subplots(1,4,figsize=(200,200))
r = rgb_img[:,:,0]#（w,h,channel）
g = rgb_img[:,:,1]
b = rgb_img[:,:,2]
a1.set_title('R channel')
a1.imshow(r)
a2.set_title('G channel')
a2.imshow(g)
a3.set_title('B channel')
a3.imshow(b)
a4.set_title("RGB channel")
a4.imshow(rgb_img)
plt.show()