Nick Weir

TL;DR previous versions of skimage `black_tophat` gives different output than the current `ndi.morphology.black_tophat` due how it handles edges, and I don't know which you would prefer be implemented in the...

I'll have a look and get back to you today or tomorrow. I'll also double-check the other binary and grey morphology functions to make sure they don't produce outputs inconsistent...

@soupault Very, very few features import and use `scikit-image`'s morphology functions-the majority directly call `scipy.ndimage` morphology functions rather than using `scikit-image` functions. In combing through I only found one case...