Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/aether/programs/anaconda3/envs/cellprofiler/lib/python2.7/site-packages/skimage/restoration/_denoise.py", line 117, in denoise_bilateral
    bins, mode, cval)
  File "skimage/restoration/_denoise_cy.pyx", line 114, in skimage.restoration._denoise_cy._denoise_bilateral
ValueError: Buffer dtype mismatch, expected 'double' but got 'float'

import numpy as np
import skimage.restoration

sigma = 16.0
sigma_range = .2
np.random.seed(0)
image = np.random.uniform(size=(100, 100)).astype(np.float32)
mask = np.ones(image.shape, bool)
mask[40:60, 45:65] = False
expected = skimage.restoration.denoise_bilateral(
    image=image,
    multichannel=False,
    sigma_color=sigma_range,
    sigma_spatial=sigma,
)

>>> print(sys.version)
2.7.14 |Anaconda, Inc.| (default, Dec  7 2017, 17:05:42) 
[GCC 7.2.0]

>>> skimage.__version__
'0.14.1'