import cv2
import numpy as np
from matplotlib import pyplot as plt

img = cv2.imread('apple.jpg',0)
ret,thresh1 = cv2.threshold(img,127,255,cv2.THRESH_BINARY)
ret,thresh2 = cv2.threshold(img,127,255,cv2.THRESH_BINARY_INV)
ret,thresh3 = cv2.threshold(img,127,255,cv2.THRESH_TRUNC)
ret,thresh4 = cv2.threshold(img,127,255,cv2.THRESH_TOZERO)
ret,thresh5 = cv2.threshold(img,127,255,cv2.THRESH_TOZERO_INV)

titles = ['Original Image','BINARY','BINARY_INV','TRUNC','TOZERO','TOZERO_INV']
images = [img, thresh1, thresh2, thresh3, thresh4, thresh5]

cv2.imshow(titles[0],images[0])
cv2.imshow(titles[1],images[1])
cv2.imshow(titles[2],images[2])
cv2.imshow(titles[3],images[3])
cv2.imshow(titles[4],images[4])
cv2.imshow(titles[5],images[5])
if cv2.waitKey(0) & 0xff == 27:
    cv2.destroyAllWindows()