[scikit-image] data types

[Juan Nunez-Iglesias]

On Mon, Apr 2, 2018, at 6:59 AM, Stefan van der Walt wrote:
> On Sun, 01 Apr 2018 13:47:41 -0400, Juan Nunez-Iglesias wrote:
> > Ralf’s comment in particular gives me pause again about my magical
> > proposal. Changing that behaviour could indeed be simply trading one
> > class of common error for another, even more annoying class.
> 
> It's worse than that: it prevents one specific use-case (the one Ralf
> mentioned, e.g., where you have very low signal, but correctly so).

No: we are arguing about default behaviour. I would always envision having the option to turn this off.

> I am strongly in favor of more expansive warning and error messages.

Great!

> > - put a big warning on the project homepage: “black images? out of
> > range errors? See this page!” The page would be the data types page,
> > to which we must add a “troubleshooting common data type errors”
> > section.
> 
> An FAQ section in the docs, linked to from the front page?

Yes!

Stéfan, btw, one last Q: what do you think about my suggestions for the (u)int32 and (u)int64 image types? I feel like assuming a range up to 2**32 when converting is *never* useful.