import numpy as np
import cv2
import math

cap = cv2.VideoCapture(0)

#fgbg = cv2.BackgroundSubtractorMOG()

while(1):
    ret, frame = cap.read()
    gray = cv2.cvtColor(frame,cv2.COLOR_BGR2GRAY)
    detec = cv2.FeatureDetector_create("SIFT")
    kp = detec.detect(gray)
    print kp
#    sift = cv2.SIFT()
#   kp = sift.detect(gray,None)

    frame=cv2.drawKeypoints(gray,kp)
#    fgmask = fgbg.apply(frame)

    cv2.imshow('esquinas frame',frame)
    cv2.imshow('grises',gray)
    k = cv2.waitKey(30) & 0xff
    if k == 27:
        break

cap.release()
cv2.destroyAllWindows()