Tutorial

103
20.2 Specific Code
import os
import cv2
from base_camera import BaseCamera
import numpy as np
import time
import threading
import imutils
'''
Set the color of the line, 255 is the white line, 0 is the black line
'''
lineColorSet = 255
'''
Set the horizontal position of the reference, the larger the value, the lower, but not greater than the vertical resolution
of the video (default 480)
'''
linePos = 380
class Camera(BaseCamera):
video_source = 0
def __init__(self):
if os.environ.get('OPENCV_CAMERA_SOURCE'):
Camera.set_video_source(int(os.environ['OPENCV_CAMERA_SOURCE']))
super(Camera, self).__init__()
@staticmethod
def set_video_source(source):
Camera.video_source = source
@staticmethod
def frames():
camera = cv2.VideoCapture(Camera.video_source)
if not camera.isOpened():
raise RuntimeError('Could not start camera.')
while True:
img = camera.read() #Get the picture captured by the camera
'''