How does Opencv save pictures? Method of saving display picture through opencv

1. Name: File name to be saved
2. Img: Specify who to save to the file here, which is Mat type

import cv2
from cv2 import IMREAD_COLOR

cv2.namedWindow('img',cv2.WINDOW_NORMAL)
img=cv2.imread('20220627214919.jpg',IMREAD_COLOR)
cv2.imshow('img',img)
key=cv2.waitKey(0)
if key==ord('q'): # 设置按q键退出
    exit()
elif key==ord('s'): # 设置按s键保存图片
    cv2.imwrite('图片路径和文件名加图片后缀（使用英文和数字）',img) # 保存图片

cv2.destroyAllWindows()