python opencv 5 color filter

 

original video: https://www.youtube.com/watch?v=ktXGUgVrVmI

blue filter

green filter

red filter

#main.py

import numpy as np

import cv2

cap = cv2.VideoCapture("assets/spinning led gyro toy.mp4")

while True:

    ret, frame = cap.read()

    width = int(cap.get(3))

    height = int(cap.get(4))

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

    lower_blue = np.array([90, 50, 50])

    upper_blue = np.array([130, 255, 255])

    lower_green = np.array([50, 90, 50])

    upper_green = np.array([255, 130, 255])

    lower_red = np.array([50, 50, 90])

    upper_red = np.array([255, 255, 130])

    mask = cv2.inRange(hsv, lower_blue, upper_blue)

    result = cv2.bitwise_and(frame, frame, mask=mask)

    cv2.imshow('frame', result)

    if cv2.waitKey(1) == ord('q'):

        break

cap.release()

cv2.destroyAllWindows()

reference:

https://www.youtube.com/watch?v=ddSo8Nb0mTw