import cv2
import numpy as np

cap = cv2.VideoCapture(0)

while(1):

    # Take each frame
    _, frame = cap.read()

    # Convert BGR to HSV
    img = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
    res = cv2.resize(img,None,fx=2, fy=2, interpolation = cv2.INTER_CUBIC)

    ret,th1 = cv2.threshold(res,127,255,cv2.THRESH_BINARY)
    th2 = cv2.adaptiveThreshold(res,255,cv2.ADAPTIVE_THRESH_MEAN_C,\
            cv2.THRESH_BINARY,11,2)
    th3 = cv2.adaptiveThreshold(res,255,cv2.ADAPTIVE_THRESH_GAUSSIAN_C,\
            cv2.THRESH_BINARY,11,2)
    ret3,th4 = cv2.threshold(res,0,255,cv2.THRESH_BINARY+cv2.THRESH_OTSU)


    cv2.imshow('frame',frame)
    cv2.imshow('T1',th1)
    cv2.imshow('T2',th2)
    cv2.imshow('T3',th3)
    cv2.imshow('T4',th4)
    k = cv2.waitKey(5) & 0xFF
    if k == 27:
        break

cv2.destroyAllWindows()