camera.py

import cv2
camera = None
def init(camera_id=0, width=640, height=480, buffer_size=1):
	global camera
	camera = cv2.VideoCapture(camera_id, cv2.CAP_V4L)
	camera.set(cv2.CAP_PROP_FRAME_WIDTH, width)
	camera.set(cv2.CAP_PROP_FRAME_HEIGHT, height)
	camera.set(cv2.CAP_PROP_BUFFERSIZE, buffer_size)
def take_picture(most_recent=False):
	global camera
	# most_recent가 True이면 버퍼에 저장되어 있는 프레임을 전부 버리도록 한다.
	len = 0 if most_recent == False else camera.get(cv2.CAP_PROP_BUFFERSIZE)
	while(len > 0):
		camera.grab( ) # 버퍼에 저장되어 있는 프레임을 버린다.
		len -= 1
		success, image = camera.read( )
		if not success:
			return None
		return image
def final( ):
	if camera != None:
		camera.release( )
	camera = None