Python之OpenCV学习笔记

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首先需要通过以下指令安装相关软件：

pip install --upgrade setuptools
pip install numpy Matplotlib
pip install opencv-python

显示图片

import cv2 as cv
img = cv.imread("test.jpg")
cv.namedWindow("Image")
cv.imshow("Image", img)
cv.waitKey(0)
cv2.destroyAllWindows()

调用电脑摄像头显示实时视频

import cv2  
import numpy
import matplotlib.pyplot as plot
cap = cv2.VideoCapture(0)
while(1):
    # get a frame
    ret, frame = cap.read()
    # show a frame
    cv2.imshow("capture", frame)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break
cap.release()
cv2.destroyAllWindows()