opencv 使用记录

将指定颜色的像素替换为其他其他颜色

import numpy as np
import cv2

image = np.zeros((400,400,3), dtype="uint8")
image[100:300,100:300]=[255,255,255]
cv2.imshow('image1',image)
cv2.waitKey()
image[np.where((image==[255,255,255]).all(axis=2))] = [255,255,0]
cv2.imshow('image2',image)
cv2.waitKey()