import cv2
import numpy as np

cap = cv2.VideoCapture(0)

while(1):

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

    # Convert BGR to HSV
    hsv = cv2.cvtColor(frame, cv2.COLOR_BGR2HSV)
    print hsv[240,320]
    # define range of blue color in HSV
    lower_blue = np.array([110,100,100])
    upper_blue = np.array([135,255,255])
    lower_blue = np.array([0,50,120]) # para el verde
    upper_blue = np.array([20,70,145]) #$ para el verde
    cv2.circle(frame,(240,320),55,[255,0,0],1)
    # Threshold the HSV image to get only blue colors
    mask = cv2.inRange(hsv, lower_blue, upper_blue)

    # Bitwise-AND mask and original image
    res = cv2.bitwise_and(frame,frame, mask= mask)

    cv2.imshow('frame',frame)
    cv2.imshow('mask',mask)
    cv2.imshow('res',res)
    k = cv2.waitKey(5) & 0xFF
    if k == 27:
        break

cv2.destroyAllWindows()