5-edge.py

fig, axes = plt.subplots(2, 3, figsize=(14, 8))
configs = [
    (1.4, 20, 60, '↑ Recall, ↑ Noise\nσ=1.4, T=20/60'),
    (1.4, 50, 150, 'Balanced\nσ=1.4, T=50/150'),
    (1.4, 100, 200, '↓ Recall, ↓ Noise\nσ=1.4, T=100/200'),
    (0.5, 50, 150, 'Fine scale\nσ=0.5, T=50/150'),
    (2.0, 50, 150, 'Coarse scale\nσ=2.0, T=50/150'),
    (4.0, 50, 150, 'Very coarse scale\nσ=4.0, T=50/150'),
]
 
for ax, (sigma, tl, th, title) in zip(axes.ravel(), configs):
    result = run_canny(image, sigma=sigma, t_low=tl, t_high=th)
    ax.imshow(result, cmap='gray')
    ax.set_title(title, fontsize=9)
    ax.axis('off')
 
plt.tight_layout()
plt.show()