我正在嘗試提取二值影像的坐標（x，y）。我需要白色蒙版的頂部、底部、左右（x，y）點，我猜這是多邊形。如下圖所示，如何取出積分？
圖片：
import cv2
import numpy as np
# read image
img = cv2.imread('white_blob.png')
# Method 1: bounding rect
# threshold on white
lower =(255,255,255)
upper = (255,255,255)
thresh = cv2.inRange(img, lower, upper)
# get points
points = np.column_stack(np.where(thresh.transpose() > 0))
x,y,w,h = cv2.boundingRect(points)
print(x,y,w,h)
min = (x,y)
max = (x w-1,y h-1)
print("min:", min)
print("max:", max)
# Method 2: Numpy
(Note: Numpy coordinates are y,x. So need to rearrange)
a = np.where(img != 0)
x1,y1,x2,y2 = np.min(a[1]), np.min(a[0]), np.max(a[1]), np.max(a[0])
min = (x1,y1)
max = (x2,y2)
print("min:", min)
print("max:", max)
兩種方法都產生 (x,y)：
min: (0, 293)
max: (127, 363)
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