opencv——python(1)

標籤：opencv入門

opencv入門的基本使用

1. 匯入opencv模組

import cv2

2.匯入numpy模組

import numpy as np

3.讀取目前的目錄圖片

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

4.建立映像

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

5.複製映像

emptyImage2 = img.copy()

6.得到映像副本，並做灰階處理

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

7.顯示映像

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

8.寫入儲存圖片

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.視窗等待

cv2.waitKey(0)cv2.destroyAllWindows()

opencv——python(1)