1. 導入opencv模塊

import cv2

2.導入numpy模塊

import numpy as np

3.讀取當前目錄圖片

img = cv2.imread("1.jpg")

4.創建圖像

emptyImage = np.zeros(img.shape, np.uint8)

5.復制圖像

emptyImage2 = img.copy()

6.得到圖像副本，並做灰度處理

emptyImage3 = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)

7.顯示圖像

cv2.imshow("EmptyImage", emptyImage)
cv2.imshow("EmptyImage1", img)
cv2.imshow("EmptyImage2", emptyImage2)
cv2.imshow("EmptyImage3", emptyImage3)
 

8.寫入保存圖片

cv2.imwrite("./cat2.jpg", img, [int(cv2.IMWRITE_JPEG_QUALITY), 5])
cv2.imwrite("./cat3.jpg", img, [int(cv2.IMWRITE_JPEG_QUALITY), 100])
cv2.imwrite("./cat.png", img, [int(cv2.IMWRITE_PNG_COMPRESSION), 0])
cv2.imwrite("./cat2.png", img, [int(cv2.IMWRITE_PNG_COMPRESSION), 9])

9.窗口等待

cv2.waitKey(0)
cv2.destroyAllWindows()
 

opencv——python(1)