# -*- coding: utf-8 -*-

#命令
__author__ = '上海色宁'

import sys
import cv2
import matplotlib.pyplot as plt
import numpy as np

import cv2
if __name__ == "__main__":
    img = cv2.cvtColor(cv2.imread(sys.argv[1]), cv2.COLOR_BGR2GRAY);
    # 二值化
    cv2.imshow('gray',img)
    ret, binary = cv2.threshold(img,0,255,cv2.THRESH_BINARY | cv2.THRESH_OTSU)
    print("threshold value: %s"%ret)
    cv2.imshow("binary",binary)
    cv2.waitKey(0)

    
    t,dst1 = cv2.threshold(img,110,255,cv2.THRESH_BINARY)
    cv2.imshow('threshold127',dst1)
    HSV = cv2.cvtColor(dst1, cv2.COLOR_BGR2HSV)
    H, S, V = cv2.split(HSV)
    LowerBlue = np.array([20, 20, 20])
    UpperBlue = np.array([30, 255, 255])
    mask = cv2.inRange(HSV, LowerBlue, UpperBlue)
    BlueThings = cv2.bitwise_and(dst1, dst1, mask=mask)
    cv2.imshow('BlueThings',BlueThings)
    
    # 显示图像
    #cv2.imshow("origin image", img)
    #cv2.imshow("THRESH_BINARY", dst1)
    
    if cv2.waitKey(10000) == 27:
    	cv2.destroyAllWindows()