#!/usr/bin/env python
# coding: utf-8

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import cv2
import numpy as np


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cap = cv2.VideoCapture("video.mp4")
knn = cv2.createBackgroundSubtractorKNN()


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while True :
    ret, frame = cap.read()
    fgmask = knn.apply(frame) 
    th = cv2.threshold(fgmask.copy(), 244, 255, cv2.THRESH_BINARY)[1]
    dilated = cv2.dilate(th, cv2.getStructuringElement(cv2.MORPH_ELLIPSE, (3,3)), iterations=2)
    contours, hierarchy = cv2.findContours(dilated, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)
    for c in contours:
        if cv2.contourArea(c) > 1600:
            (x,y,w,h) = cv2.boundingRect(c)
            cv2.rectangle(frame, (x,y), (x+w, y+h), (0,255,0), 2)
    cv2.imshow('detection', frame)
    if cv2.waitKey(100) & 0xff == ord('q'):
        break
cap.release()
cv2.destroyAllWindows()     


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