OpenCV Capture Image From Camera

Capture Image From Camera

Using OpenCV, you can capture video from your computer's webcam and use these videos for many purposes. OpenCV provides a very simple interface for video capture process. It takes preparation to capture video. To capture a video, you must create a VideoCapture object. Its argument may be the device index.

capture = cv2.VideoCapture(0)

 The device index is just the number that determines which camera to use. Normally 0 is selected if a camera will be connected. You can select the second camera by giving a value of 1. After that, you can shoot frame by frame.

ret, frame = capture.read()

 cap.read () returns a bool value. If the frame reads correctly, the value will be True. With the Cap.isOpened () method, you can check whether the video capture process is started. If it's true, it's okay. If not, you need to open it using cap.open ().

The codes are all as follows:

import cv2



capture = cv2.VideoCapture(0)



while(True):

 # Capture the image

 ret, frame = capture.read()



 # Show the captured image

 cv2.imshow('frame',frame)

 if cv2.waitKey(1) & 0xFF == ord('e'):

   break



capture.release()

cv2.destroyAllWindows()