学习笔记(15):Python+OpenCV计算机视觉-threshold函数

立即学习:https://edu.csdn.net/course/play/10552/234930?utm_source=blogtoedu

图像阈值（threshold实现）

函数threshold

retval,dst = cv2.threshold(src,thresh,maxval,type)

retval 阈值   dst  处理结果

src 原图像  threshhold  阈值

maxval 最大值  type  类型

import cv2
import numpy as np
a = cv2.imread('111.jpg',cv2.IMREAD_GRAYSCALE)
r,b = cv2.threshold(a,128,255,cv2.THRESH_BINARY)
r,c = cv2.threshold(a,128,255,cv2.THRESH_BINARY_INV)
r,d = cv2.threshold(a,128,255,cv2.THRESH_TOZERO)
r,e = cv2.threshold(a,128,255,cv2.THRESH_TOZERO_INV)
r,f = cv2.threshold(a,128,255,cv2.THRESH_TRUNC)
print(a)
cv2.imshow('a',a)
cv2.imshow('b',b)
cv2.imshow('c',c)
cv2.imshow('d',d)
cv2.imshow('e',e)
cv2.imshow('f',f)
cv2.waitKey(0)
cv2.destroyAllWindows()