detectmotion.py

from imutils.video import VideoStream
import argparse
import datetime
import imutils
import time
import cv2

import RPi.GPIO as GPIO 

GPIO.setmode(GPIO.BCM)
LED = 24
GPIO.setup(LED, GPIO.OUT)
GPIO.setwarnings(False)


ap = argparse.ArgumentParser()
ap.add_argument("-v", "--video", help="path to the video file")
ap.add_argument("-a", "--min-area", type = int, default = 500, help = "minimum area size")
args = vars(ap.parse_args())

if args.get("video", None) is None:
	vs = VideoStream(src).start()
	time.sleep(5.0)
else:
	vs = cv2.VideoCapture(args["video"])

firstFrame = None

while True:
	_, frame = vs.read()
	text = "Unoccupied"
	GPIO.output(LED,False)
	
	if frame is None:
		break
		
	frame = imutils.resize(frame, width=500)
	gray = cv2.cvtColor(frame,cv2.COLOR_BGR2GRAY)
	gray = cv2.GaussianBlur(gray,(21,21),0)
	
	if firstFrame is None:
		firstFrame = gray
		continue
		
	frameDelta = cv2.absdiff(firstFrame,gray)
	thresh = cv2.threshold(frameDelta,25,255,cv2.THRESH_BINARY)[1]
	
	thresh = cv2.dilate(thresh,None,iterations=2)
	cnts = cv2.findContours(thresh.copy(), cv2.RETR_EXTERNAL,
			cv2.CHAIN_APPROX_SIMPLE)
	cnts = imutils.grab_contours(cnts)
	
	for c in cnts:
		if cv2.contourArea(c) < args["min_area"]:
			continue
			
		(x,y,w,h) = cv2.boundingRect(c)
		cv2.rectangle(frame,(x,y),(x+w,y+h), (0,255,0),2)
		text = "Occupied"
		GPIO.output(LED,True)
		
		
	cv2.putText(frame, "Room Status: {}".format(text), (10,20), cv2.FONT_HERSHEY_SIMPLEX, 0.5, (0,0,255),2)
	cv2.putText(frame, datetime.datetime.now().strftime("%A %d %B %Y %I: %M: %S%p"), (10,frame.shape[0]-10), cv2.FONT_HERSHEY_SIMPLEX, 0.35,(0,0,255),1)
		
	cv2.imshow("Security Feed", frame)
	cv2.imshow("Thresh", thresh)
	cv2.imshow("Frame Delta", frameDelta)
	key = cv2.waitKey(1) & 0xFF
	
	if key == ord("q"):
		break
	
vs.stop() if args.get("video", None) is None else vs.release()
cv2.destroyAllWindows()