import cv2
import numpy as np

cap = cv2.VideoCapture(0)

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

    # Convert BGR to HSV
    hsv = cv2.cvtColor(frame, cv2.COLOR_BGR2HSV)

    # define color range  in HSV
    lower_range = np.array([78,100,150])
    upper_range = np.array([138,255,255])
    
    # Threshold the HSV image to get only blue colors
    mask = cv2.inRange(hsv, lower_range, upper_range)
   

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

cv2.destroyAllWindows()