import cv2
img = cv2.imread("./images/Lena.jpg",1/*_CV2_IMREAD_COLOR*/)
img = cv2.medianBlur(img,5)
cv2.imshow( "窗口标题",img )
cv2.imwrite("./images/result.jpg",img,{1/*_CV2_IMWRITE_JPEG_QUALITY*/,80}) 
cv2.waitKey(0)