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Created May 28, 2016 13:31
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# import the necessary packages
import argparse
import datetime
import imutils
import time
import cv2
#import subprocess"sudo modprobe bcm2835-v4l2")
# construct the argument parser and parse the arguments
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())
def detectDirection(motionvecs):
if(len(motionvecs) != 0):
return ((motionvecs[len(motionvecs)-1][0] - motionvecs[0][0]) < 0)
return 0
# if the video argument is None, then we are reading from webcam
if args.get("video", None) is None:
camera = cv2.VideoCapture(0)
# otherwise, we are reading from a video file
camera = cv2.VideoCapture(args["video"])
# initialize the first frame in the video stream
firstFrame = None
motionvecs = []
(g,f) =
(a,b) =
# loop over the frames of the video
text = 'Unoccupied'
while True:
# grab the current frame and initialize the occupied/unoccupied
# text
(grabbed, frame) =
# if the frame could not be grabbed, then we have reached the end
# of the video
if not grabbed:
# resize the frame, convert it to grayscale, and blur it
frame = imutils.resize(frame, width=500)
gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
gray = cv2.GaussianBlur(gray, (21, 21), 0)
# if the first frame is None, initialize it
if firstFrame is None:
firstFrame = gray
# compute the absolute difference between the current frame and
# first frame
frameDelta = cv2.absdiff(firstFrame, gray)
thresh = cv2.threshold(frameDelta, 25, 255, cv2.THRESH_BINARY)[1]
# dilate the thresholded image to fill in holes, then find contours
# on thresholded image
thresh = cv2.dilate(thresh, None, iterations=2)
(cnts, _) = cv2.findContours(thresh.copy(), cv2.RETR_EXTERNAL,
# loop over the contours
if(len(cnts) > 0):
for c in cnts:
# if the contour is too small, ignore it
if cv2.contourArea(c) < args["min_area"]:
# compute the bounding box for the contour, draw it on the frame,
# and update the text
(x, y, w, h) = cv2.boundingRect(c)
cv2.rectangle(frame, (x, y), (x + w, y + h), (0, 255, 0), 2)
text = "Occupied"
if(text == 'Occupied'):
motionvecs = []
text = 'Unoccupied'
# draw the text and timestamp on the frame
cv2.putText(frame, "Room Status: {}".format(text), (10, 20),
cv2.FONT_HERSHEY_SIMPLEX, 0.5, (0, 0, 255), 2)
cv2.putText(frame,"%A %d %B %Y %I:%M:%S%p"),
(10, frame.shape[0] - 10), cv2.FONT_HERSHEY_SIMPLEX, 0.35, (0, 0, 255), 1)
# show the frame and record if the user presses a key
cv2.imshow("Security Feed", frame)
cv2.imshow("Thresh", thresh)
cv2.imshow("Frame Delta", frameDelta)
key = cv2.waitKey(1) & 0xFF
# if the `q` key is pressed, break from the lop
if key == ord("q"):
# cleanup the camera and close any open windows
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I tried put a video.mp4 but it's always reading the webcam source

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