OpenCV (8) - Tracker

Tracker를 생성하는 함수

cv2.createTrackbar(track_bar_name,window_name,value,count,on_change)

value : 초기 값
count : Max 값(Min : 0)
on_change : 값이 변경될 때 호출되는 Callback 함수

import cv2
import numpy as np

def change_color(x):
    r = cv2.getTrackbarPos("R", "Image")
    g = cv2.getTrackbarPos("G", "Image")
    b = cv2.getTrackbarPos("B", "Image")
    image[:] = [b,g,r]
    cv2.imshow('Image',image)
    
image = np.zeros((600, 400, 3), np.uint8)
cv2.nameWindow("Image")

cv2.createTrackbar("R", "Image", 0, 255, change_color)
cv2.createTrackbar("G", "Image", 0, 255, change_color)
cv2.createTrackbar("B", "Image", 0, 255, change_color)

cv2.imshow('Image', image)
cv2.waitKey(0)