将下述代码增加显示边缘图像功能： import cv2 import numpy as np from dxfwrite import DXFEngine as dxf img = cv2.imread('ft.jpg', 0) edges = cv2.Canny(img, 100, 200) thresh = cv2.threshold(edges, 27, 255, cv2.THRESH_BINARY)[1] contours, hierarchy = cv2.findContours(thresh, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE) dwg = dxf.drawing('output2.dxf') for contour in contours: if len(contour) > 1: dwg.add(dxf.polyline(contour[:, 0, :])) dwg.save()

可以在代码最后添加以下代码来显示边缘图像：

cv2.imshow('Edges', edges)
cv2.waitKey(0)
cv2.destroyAllWindows()

完整代码如下：

import cv2
import numpy as np
from dxfwrite import DXFEngine as dxf

img = cv2.imread('ft.jpg', 0)
edges = cv2.Canny(img, 100, 200)
thresh = cv2.threshold(edges, 27, 255, cv2.THRESH_BINARY)[1]
contours, hierarchy = cv2.findContours(thresh, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)

dwg = dxf.drawing('output2.dxf')

for contour in contours:
    if len(contour) > 1:
        dwg.add(dxf.polyline(contour[:, 0, :]))

dwg.save()

cv2.imshow('Edges', edges)
cv2.waitKey(0)
cv2.destroyAllWindows()

运行代码后，会在生成的 DXF 文件同时显示边缘图像。