Smothing images using Low pass filters

import cv2
import numpy as ns

img= cv2.imread('SampleImage.jpg', 0)           # Loading image
blur=cv2.blur(img, (5, 5))                      # Blurring image using normal filter
guassian = cv2.GaussianBlur(img, (5, 5), 0)     # Bluring image using gaussian filter
median = cv2.medianBlur(img, 5)                 # Bluring image using median filter
bilateral = cv2.bilateralFilter(img, 9, 75, 75) # Bluring image using bilateral filter

while True:                                     # Displaying images as per filter used
    cv2.imshow("Blurred", blur)
    cv2.imshow("Normal", img)
    cv2.imshow("Gaussian blur", guassian)
    cv2.imshow("Median blur ", median)
    cv2.imshow("Bilateral ", bilateral)
    if cv2.waitKey(0) & 0xFF == 27:
        break
cv2.destroyAllWindows()