how to detect bifurcation, trifurcation, and crossover from the branch point with OpenCV when the input like this

enter image description here

Expect output :

enter image description here

I'm trying to use binary_hit_or_miss but I don't know how to display the detected area

import io
import numpy as np    
from PIL import Image
from scipy import ndimage
from IPython.display import display # to display images

image_string = open('image/skeleton/21_bloodvessel.png', 'rb').read()
img = Image.open(io.BytesIO(image_string))
arr = np.asarray(img)

structure1 = [
np_array=ndimage.binary_hit_or_miss(arr, structure1=structure1).astype(np.int)
im = display(np_array)

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