Numpy 检测边缘

from sklearn.datasets import load_sample_images
from matplotlib.pyplot import imshow, show, axis
import numpy
import skimage.filter

dataset = load_sample_images()
img = dataset.images[0]
edges = skimage.filter.canny(img[..., 0], 2, 0.3, 0.2)
axis('off')
imshow(edges)
show()