计算二进制阈值图像中非白色区域的表面积(python)

import cv2
import numpy as np

image = cv2.imread('binary_threshold_image.png', 0)

image = cv2.bitwise_not(image)

contours, _ = cv2.findContours(image, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)

total_area = 0
for contour in contours:
    area = cv2.contourArea(contour)
    total_area += area

print("非白色区域的表面积为:", total_area)