Python | OpenCV生成调色板表单组件

    import cv2
    import numpy as np
    
    
    def nothing(x):
    pass
    
    
    # 创建一个黑色图像
    img = np.zeros((300, 512, 3), np.uint8)
    cv2.namedWindow('image')
    cv2.createTrackbar('R', 'image', 0, 255, nothing)
    cv2.createTrackbar('G', 'image', 0, 255, nothing)
    cv2.createTrackbar('B', 'image', 0, 255, nothing)
    while 1:
    cv2.imshow('image', img)
    k = cv2.waitKey(1)
    if k == ord('q'):  # 按q键退出
        break
    b = cv2.getTrackbarPos('R', 'image')
    g = cv2.getTrackbarPos('G', 'image')
    r = cv2.getTrackbarPos('B', 'image')
    img[:] =