Pycharm open CV learning 2

How to open the camera

import cv2
cap = cv2.VideoCapture(0)
cap.set(3,640)
cap.set(4,480)

while True:
    success, img = cap.read()
    cv2.imshow("video",img)
    if cv2.waitKey(1) & 0xFF == ('q'):
        break

then you can see your camera is working

you can do more brightlight

import cv2
cap = cv2.VideoCapture(0)
cap.set(3,640)
cap.set(4,480)
cap.set(10,100)

while True:
    success, img = cap.read()
    cv2.imshow("video",img)
    if cv2.waitKey(1) & 0xFF == ('q'):
        break