如何使用Python和Opencv计算白色区域？

import cv2
import numpy as np

image = cv2.imread('image.jpg')
gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)

_, binary = cv2.threshold(gray, 127, 255, cv2.THRESH_BINARY)

white_pixels = cv2.countNonZero(binary)

total_pixels = binary.shape[0] * binary.shape[1]
white_ratio = white_pixels / total_pixels

print("白色区域的比例：", white_ratio)