hand_contour.py

import cv2
img=cv2.imread('hand.jpeg')
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
edge = cv2.Canny(gray, 50, 140)
contours, hierarchy = cv2.findContours(edge, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_NONE)
print('Numbers of contours are : ', len(contours))
cv2.drawContours(img, contours, -1, (0, 0, 255), 3)
cv2.imshow("final",img)
cv2.waitKey(0)
cv2.destroyAllWindows()