4-2 图像灰度处理1

#imread
#方法1 imread
import cv2
img0 = cv2.imread(‘image0.jpg‘,0)
img1 = cv2.imread(‘image0.jpg‘,1)
print(img0.shape)
print(img1.shape)
cv2.imshow(‘src‘,img0)
cv2.waitKey(0)

#方法2 cvtColor
import cv2
img = cv2.imread(‘image0.jpg‘,1)
dst = cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)# 颜色空间转换 1 data 2 BGR gray
cv2.imshow(‘dst‘,dst)
cv2.waitKey(0)