How to Blur an Image in OpenCV

Program 1

import cv2
img=cv2.imread("D://opencvapp//natureImages//exploring-jungle.jpg")
img=cv2.resize(img,(300,300))
img1=cv2.blur(img,(9,9))
img1=cv2.resize(img1,(300,300))
img2=cv2.GaussianBlur(img,(17,17),10)
img2=cv2.resize(img2,(300,300))
img3=cv2.medianBlur(img,19)
img3=cv2.resize(img3,(300,300))
img4=cv2.vconcat([img,img1,img2,img3])
#img4=cv2.resize(img4,(1000,1000))
cv2.imshow('Image Window',img4)
cv2.waitKey(0)
cv2.destroyAllWindows()