hsv.py

import cv2
import numpy as np

cap=cv2.VideoCapture(0)

def nothing(x):
    pass

cv2.namedWindow("TrackBar")
cv2.resizeWindow("TrackBar",500,500)

cv2.createTrackbar("Lower- H","TrackBar",0,180,nothing)
cv2.createTrackbar("Lower- S","TrackBar",0,255,nothing)
cv2.createTrackbar("Lower- V","TrackBar",0,255,nothing)

cv2.createTrackbar("Upper- H","TrackBar",0,180,nothing)
cv2.createTrackbar("Upper- S","TrackBar",0,255,nothing)
cv2.createTrackbar("Upper- V","TrackBar",0,255,nothing)

cv2.setTrackbarPos("Upper- H","TrackBar",180)
cv2.setTrackbarPos("Upper- S","TrackBar",255)
cv2.setTrackbarPos("Upper- V","TrackBar",255)


while True:
    ret,frame=cap.read()
    #This code prevent mirror effection , It turns images opposite
    frame=cv2.flip(frame,1)

    frame_hsv=cv2.cvtColor(frame,cv2.COLOR_BGR2HSV)

    lower_h=cv2.getTrackbarPos("Lower- H","TrackBar")
    lower_s=cv2.getTrackbarPos("Lower- S","TrackBar")
    lower_v=cv2.getTrackbarPos("Lower- V","TrackBar")

    upper_h = cv2.getTrackbarPos("Upper- H", "TrackBar")
    upper_s = cv2.getTrackbarPos("Upper- S", "TrackBar")
    upper_v = cv2.getTrackbarPos("Upper- V", "TrackBar")

    lower_color=np.array([lower_h,lower_s,lower_v])
    upper_color = np.array([upper_h, upper_s, upper_v])

    mask=cv2.inRange(frame_hsv, lower_color,upper_color)
    cv2.imshow("Original",frame)
    cv2.imshow("Mask",mask)

    if cv2.waitKey(20) & 0xFF==ord("q"):
        break
cap.realese()
cv2.destroyAllWindows()