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

cap = cv2.VideoCapture(0)

def nothing(x):
    pass

cv2.namedWindow('Tracking')

cv2.createTrackbar('LH',"Tracking",0,255,nothing)
cv2.createTrackbar('LS',"Tracking",0,255,nothing)
cv2.createTrackbar('LV',"Tracking",0,255,nothing)
cv2.createTrackbar('HH',"Tracking",0,255,nothing)
cv2.createTrackbar('HS',"Tracking",0,255,nothing)
cv2.createTrackbar('HV',"Tracking",0,255,nothing)


while True:
    b, frame = cap.read()
    hsv = cv2.cvtColor(frame, cv2.COLOR_BGR2HSV)
    
    l_h = cv2.getTrackbarPos("LH","Tracking")
    l_s = cv2.getTrackbarPos("LS","Tracking")
    l_v = cv2.getTrackbarPos("LV","Tracking")
    h_h = cv2.getTrackbarPos("HH","Tracking")
    h_s = cv2.getTrackbarPos("HS","Tracking")
    h_v = cv2.getTrackbarPos("HV","Tracking")
    
    l_b = np.array([l_h,l_s,l_v])
    u_b = np.array([h_h,h_s,h_v])
    
    mask = cv2.inRange(hsv,l_b, u_b)
    res = cv2.bitwise_and(frame,frame,mask=mask)
    
    cv2.imshow("Frame",frame)
    cv2.imshow("Mask",mask)
    cv2.imshow("res",res)
    
    if cv2.waitKey(25) and 0xff == ord("q"):
        break
    
cap.release()
cv2.destroyAllWindows()