最大连通域之python opencv connectedCom

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

"""

Created on Fri Mar 29 16:24:57 2019

@author: xiepeng

"""

import cv2

import numpy as np

im=cv2.imread('C:\\Users\\x\\Desktop\\liantogyu.bmp')

w,h,n= im.shape

im_gray = cv2.cvtColor(im,cv2.COLOR_RGB2GRAY)

_,thresh = cv2.threshold(im_gray,128,255,cv2.THRESH_BINARY)

cv2.imshow('th',thresh)

nccomps = cv2.connectedComponentsWithStats(thresh)#labels,stats,centroids

_ = nccomps[0]

labels = nccomps[1]

centroids = nccomps[3]

status = nccomps[2]

for row in range(status.shape[0]):

    if status[row,:][0] == 0 and status[row,:][1] == 0:

        background = row

    else:

      continue

status_no_background = np.delete(status,background,axis=0)

rec_value_max = np.asarray(status_no_background[:,4].max())

re_value_max_position = np.asarray(status_no_background[:,4].argmax())

h = np.asarray(labels,'uint8')

h[h==(re_value_max_position+1)]=255

for single in range(centroids.shape[0]):

    print(tuple(map(int,centroids[single])))

    #position = tuple(map(int,centroids[single]))

    #cv2.circle(h, position, 1, (255,255,255), thickness=0,lineType=8)

cv2.imshow('h',h)

cv2.imshow('im_bw',thresh)

cv2.imshow('im_origin',im)

cv2.waitKey(0)

cv2.destroyAllWindows()