how to draw shapes (ellipses, rectange, circle, etc) with line width thicker than 1 pixel

The skimage.draw module has functions to draw circles, ellipses, lines, etc. However the line width seems to be fixed at 1 pixel. There doesn't appear to be a parameter to set the line width.

Stefan van der Walt suggested that there is hidden functionality in the skimage.measure submodule to draw thicker lines, but I had a look at the documentation and only saw the profile_line function which does have a linewidth parameter. I don't know if this what he meant, or how I can use that to draw an ellipse with width=3.

So how can I draw an ellipse with thickness of 3 pixels into a numpy image array (type float)? Preferably using skimage.

Solution

I would use draw to draw a 1-pixel thick line, then use skimage.morphology.dilation to "thicken" that line:

import numpy as np
import matplotlib.pyplot as plt
from skimage import draw, morphology

image = np.zeros((128, 128))
rr, cc = draw.ellipse_perimeter(64, 64, 20, 10)
image[rr, cc] = 1
dilated = morphology.dilation(image, morphology.disk(radius=1))
fig, (ax0, ax1) = plt.subplots(1, 2)
ax0.imshow(image)
ax1.imshow(dilated)