如何将框架 colors 与 OpenCV 更改为与显示器相同？

Question

我无法更改 colors 以使它们与我的天然透析 colors 相同。 它们总是倒置的。 我尝试过使用不同的色彩空间，但无法让它工作。 我希望程序捕获我的屏幕，但也能够在屏幕上检测到某些 colors

import cv2
import numpy as np
import pyautogui


def nothing(x):
    pass


cv2.namedWindow("Tracking")
cv2.createTrackbar("LH", "Tracking", 0, 255, nothing)
cv2.createTrackbar("LS", "Tracking", 0, 255, nothing)
cv2.createTrackbar("LV", "Tracking", 0, 255, nothing)
cv2.createTrackbar("UH", "Tracking", 255, 255, nothing)
cv2.createTrackbar("US", "Tracking", 255, 255, nothing)
cv2.createTrackbar("UV", "Tracking", 255, 255, nothing)

while True:

    screenshot = pyautogui.screenshot()
    screenshot = np.array(screenshot)

    hsv = cv2.cvtColor(screenshot, cv2.COLOR_BGR2HSV) #

    l_h = cv2.getTrackbarPos("LH", "Tracking")
    l_s = cv2.getTrackbarPos("LS", "Tracking")
    l_v = cv2.getTrackbarPos("LV", "Tracking")

    u_h = cv2.getTrackbarPos("UH", "Tracking")
    u_s = cv2.getTrackbarPos("US", "Tracking")
    u_v = cv2.getTrackbarPos("UV", "Tracking")

    l_b = np.array([l_h, l_s, l_v])
    u_b = np.array([u_h, u_s, u_v])

    mask = cv2.inRange(hsv, l_b, u_b)

    res = cv2.bitwise_and(screenshot, screenshot, mask=mask)

    # cv2.imshow("screenshot", screenshot)
    cv2.imshow("mask", mask)
    cv2.imshow("res", res)

    key = cv2.waitKey(1)
    if key == 27:
        break

cv2.destroyAllWindows()

Answer 1

您正在使用 Pyautogui 截屏，它必须以 RGB 格式读取，而不是 Opencv 中使用的 BGR。 因此，在阅读屏幕截图后将其转换为 BGR。

screenshot = pyautogui.screenshot()
screenshot = np.array(screenshot)
screenshot = cv2.cvtColor(screenshot, cv2.COLOR_RGB2BGR)