Look at replacing opencv and mahotas libraries with alternatives

[samaloney]

mahotas.polygon.fill_polygon seems like it could be replaced with https://scikit-image.org/docs/0.7.0/auto_examples/plot_shapes.html

cv2.findContours seems like could be replaced with https://scikit-image.org/docs/stable/api/skimage.measure.html#skimage.measure.find_contours

or even this is the data is Map
https://docs.sunpy.org/en/stable/generated/api/sunpy.map.GenericMap.html#sunpy.map.GenericMap.contour

The mahotas library doesn't seem to install for python 3.11 or 3.12 on macOS