import cv2
im=cv2.imread('spider.png',-1)
cv2.imshow("original image",im)
cv2.waitKey(0)
gray_pic = cv2.cvtColor(im, cv2.COLOR_BGR2GRAY)
r, threshold = cv2.threshold(gray_pic, 127, 255, cv2.THRESH_BINARY)
cv2.imshow('Binary Image',threshold)
cv2.waitKey(0)