Opencv-管理图片

准备两个大小相同的图片

import numpy as np
import cv2

a = cv2.imread(r'1.png')
a[100:200, 200:300] = np.random.randint(0, 256, (100, 100, 3))
cv2.imshow('masaike', a)
cv2.waitKey(1000000)
cv2.destroyAllWindows()

这时候python会把你原来大小的图片打印出来

import cv2
a = cv2.imread('1.png')
b = cv2.imread('2.png')
b[200:350, 200:350] = a[50:200, 100:250]
cv2.imshow('b', b)
cv2.imshow('a', a)
cv2.waitKey(100000)
cv2.destroyAllWindows()

这里会把上一张的切片放在这里

import cv2

a = cv2.imread('1.png')
a_new = cv2.resize(a, dsize=(200, 600))
cv2.imshow('a', a)
cv2.imshow('a_new', a_new)
cv2.waitKey(100000)
cv2.destroyAllWindows()