from __future__ import print_function
import cv2 as cv


# backSub = cv.createBackgroundSubtractorMOG2()
backSub = cv.createBackgroundSubtractorKNN()

capture = cv.VideoCapture(0)

while True:
    ret, frame = capture.read()
    if frame is None:
        break
    
    fgMask = backSub.apply(frame)
    
    cv.imshow('Frame', frame)
    cv.imshow('FG Mask', fgMask)
    
    keyboard = cv.waitKey(30)
    if keyboard == 'q' or keyboard == 27:
        break