contours_1.py

import numpy as np
import cv2
imgpath="C:\\Users\\Angad Bajwa\\Downloads\\Messi.jpg"
img=cv2.imread(imgpath)
cv2.imshow('sample',img)
imgray = cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)
ret,thresh = cv2.threshold(imgray,127,255,0)
contours, hierarchy = cv2.findContours(thresh,cv2.RETR_TREE,cv2.CHAIN_APPROX_SIMPLE)
img_a = cv2.drawContours(img, contours, -1, (0,255,0), 3)

cv2.imshow('output',img_a)
cv2.waitKey(0)
cv2.destroyAllWindows()