# -*- coding: utf-8 -*-
# @Time    : 2017/7/5 下午5:33
# @Author  : play4fun
# @File    : findContours2.py
# @Software: PyCharm

"""
findContours2.py:
http://blog.csdn.net/sunny2038/article/details/12889059
"""

import cv2

img = cv2.imread('contour.jpg')
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
ret, binary = cv2.threshold(gray, 127, 255, cv2.THRESH_BINARY)

cv2.imshow("thresh", binary)

# contours, hierarchy = cv2.findContours(binary, cv2.RETR_TREE, cv2.CHAIN_APPROX_SIMPLE)
image, contours, hierarchy = cv2.findContours(binary, cv2.RETR_TREE, cv2.CHAIN_APPROX_SIMPLE)
print("contours size: ", len(contours))

cv2.drawContours(img, contours, -1, (0, 0, 255), 3)

cv2.imshow("img", img)
cv2.waitKey(0)