opencv 采用 matplot 显示图片

opencv 采用　matplot 显示图片

import numpy as np
import cv2
from matplotlib import pyplot as plt

img=cv2.imread('tt.png',cv2.IMREAD_COLOR)

#method1
b,g,r=cv2.split(img)
img2=cv2.merge([r,g,b])
plt.imshow(img2)
plt.show()

##method2
#img3=img[:,:,::-1]
#plt.imshow(img3)
#plt.show()
#
##method3
#img4=cv2.cvtColor(img, cv2.COLOR_BGR2RGB)
#plt.imshow(img4)
#plt.show()