1.3灰度图
运行结果如下：
代码如下：
import cv2
img_rgb=cv2.imread("./image/cat.jpg",1)
img_gray=cv2.imread("./image/cat.jpg",0)
cv2.imshow("rgb",img_rgb)
cv2.imshow("gray",img_gray)
print("rgb shape:"+str(img_rgb.shape)+"gray shape:"+str(img_gray.shape))
cv2.waitKey(0)
cv2.destroyAllWindows()def img_read():img_rgb=cv2.imread("./image/cat.jpg",1)b,g,r=cv2.split(img_rgb)img_merge=cv2.merge(b,g,r)cv2.imshow("rgb",img_rgb)cv2.imshow("gray",r)cv2.imshow("merge",img_merge)print("rgb shape:"+str(img_rgb.shape)+"gray shape:"+str(g.shape))cv2.waitKey(0)cv2.destroyAllWindows()
