text: import cv2 as cv 
  
  img = cv.imread('../../images/shapes_image.png')
  cv.imshow('img', img)
  cv.waitKey(0)
  grayscale_img = cv.cvtColor(img, cv.COLOR_BGR2GRAY)
  cv.imshow('gray_scale', grayscale_img)
  cv.waitKey(0)
  # detecting Edges in the gray scale images 
  edges_img = cv.Canny(grayscale_img, 30, 200)
  cv.imshow("edges", edges_img)
  cv.waitKey(0)
  