contour_test2.py

import numpy as np
import cv2

im = cv2.imread('test.jpg')
imgray = cv2.cvtColor(im,cv2.COLOR_BGR2GRAY)
ret,thresh = cv2.threshold(imgray,127,255,0)
contours, hierarchy = cv2.findContours(thresh,cv2.RETR_TREE,cv2.CHAIN_APPROX_SIMPLE)
#cv2.drawContours(im,contours,-1,(0,255,0),3)
cv2.imshow('res',im)
if cv2.waitKey(0) & 0xff == 27:
    cv2.destroyAllWindows()