invisible.py

import cv2
import numpy as np

cap = cv2.VideoCapture(0)
back = cv2.imread('./image.jpg')

while cap.isOpened():
    ret, frame = cap.read()

    if ret:
        hsv = cv2.cvtColor(frame, cv2.COLOR_BGR2HSV)
        l_red = np.array([0, 100, 100])
        u_red = np.array([10, 255, 255])

        mask = cv2.inRange(hsv, l_red, u_red)
        kernel = np.ones((5, 5), np.uint8)

        mask = cv2.morphologyEx(mask, cv2.MORPH_OPEN, kernel)
        mask = cv2.morphologyEx(mask, cv2.MORPH_DILATE, kernel)

        mask2 = cv2.bitwise_not(mask)

        part1 = cv2.bitwise_and(back, back, mask=mask)
        part2 = cv2.bitwise_and(frame, frame, mask=mask2)

        cv2.imshow("cloak", part1+part2)

        if cv2.waitKey(5) == ord('q'):
             break

cap.release()
cv2.destroyAllWindows()