Python:创建形状未知的蒙版

import cv2

image = cv2.imread('image.jpg')

gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)

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

kernel = cv2.getStructuringElement(cv2.MORPH_RECT, (5, 5))
closed = cv2.morphologyEx(threshold, cv2.MORPH_CLOSE, kernel)

contours, _ = cv2.findContours(closed.copy(), cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)

mask = np.zeros(image.shape[:2], dtype="uint8")

cv2.drawContours(mask, contours, -1, (255, 255, 255), -1)