1 # -*- coding: utf-8 -*- 2 """ 3 Created on Thu Dec 20 16:05:10 2018 4  5 @author: leizhen.liu 6 """ 7  8 import cv2.cv2 as cv2 9 import numpy as np10 11 data = cv2.imread('anwser.jpg')12 cv2.imshow('anwser',data)13 14 15 #灰度處理16 gray = cv2.cvtColor(data,cv2.COLOR_BGR2GRAY)17 cv2.imshow('gray',gray)18 19 20 kernel = np.ones((5,5),np.uint8) 21 22 #膨脹操作23 pengzhang = cv2.dilate(gray,kernel,iterations =1)24 cv2.imshow('pengzhang',pengzhang)25 26 #腐蝕27 fushi = cv2.erode(pengzhang,kernel,iterations =1)28 cv2.imshow('fushi',fushi)29 30 31 #二值化32 ret ,color2 = cv2.threshold(fushi,127,255,cv2.THRESH_BINARY_INV)33 cv2.imshow('binary',color2)34 35 #轮廓36 _,contours,hierarchy=cv2.findContours(color2,cv2.RETR_EXTERNAL,cv2.CHAIN_APPROX_SIMPLE)  37 #newimg=np.zeros_like(color2)   38 cv2.drawContours(data, contours, -1, (0,0,255),1)39 cv2.imshow('lunkuo',data)40 41 cv2.waitKey(0)

注意点：1、cv2.waitKey() 要写否则图片不能显示。