import cv2
import numpy as np
; 获取背景
1.通过二值法得到黑白图片
2.通过形态学获取北京
img = cv2.imread(‘imgs/yb.png’)
cv2.imshow(‘img’,img)
img = cv2.imread(‘images/yn.png’)
gray = cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)
cv2.imshow(‘gray’,gray)
ret,thresh = cv2.threshold(gray,0,255,cv2.THRESH_BINARY_INV+cv2.THRESH_OTSU)
cv2.imshow(‘thresh’,thresh)
开运算 去除噪点
kernel = np.ones((3,3),np.int8)
open1 = cv2.morphologyEx(thresh,cv2.MORPH_OPEN,kernel,iterations=2)
cv2.imshow(‘open1’,open1)
膨胀
bg = cv2.dilate(open1,kernel,iterations=1)
cv2.imshow(‘bg’,bg)
cv2.waitKey(0)
Original: https://blog.csdn.net/jialan75/article/details/123159593
Author: jialan75
Title: opencv 二值 开运算 去除噪点 膨胀
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