# -*- coding: utf-8 -*-
import datetime
import cv2
from cv2 import waitKey
import getopt
import sys



def check_frame(frame):
    #image = frame[176:234,280:426]     
    image = frame[180:230,250:370]  #frame[176:234,280:426]

    #cv2.imshow('src',image)
    gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
    thresh = cv2.threshold(gray, 0, 255,
                       cv2.THRESH_BINARY_INV | cv2.THRESH_OTSU)[1]
    kernel = cv2.getStructuringElement(cv2.MORPH_ELLIPSE, (6, 6))
    counter = cv2.morphologyEx(thresh.copy(), cv2.MORPH_OPEN, kernel)
    image_h = image.shape[0]
    contours, hierarchy = cv2.findContours(counter,cv2.RETR_CCOMP,cv2.CHAIN_APPROX_SIMPLE)
    for c in contours:
        x, y, w, h = cv2.boundingRect(c)
        if image_h*0.98 > h > image_h * 0.3:
            #print((x, y, w, h))
            cv2.rectangle(image, (x, y), (x+w, y+h), (0, 255, 0), 2)
    cv2.imshow('frame',image)
    waitKey(0)

# 程序入口
if __name__ == '__main__':
    check_frame(cv2.imread(sys.argv[1]))