import matplotlib.pyplot as plt
import numpy as np
from regions import RegionBoundingBox

bbox = RegionBoundingBox(2, 7, 3, 8)
fig, ax = plt.subplots()
rng = np.random.default_rng(0)
ax.imshow(rng.random((10, 10)), origin='lower')
ax.add_patch(bbox.as_artist(facecolor='none', edgecolor='white',
             lw=2.))