How about clip_negative?  I agree this should be the default.

On Wednesday, February 27, 2013, Tony S Yu wrote:

> In skimage/util/dtype.py:
>
> > @@ -28,6 +28,23 @@
> >      _supported_types += (np.float16, )
> >
> >
> > +def dtype_limits(image, auto_clip=True):
> > +    """Return intensity limits, i.e. (min, max) tuple, of the image's dtype.
> > +
> > +    Parameters
> > +    ----------
> > +    image : ndarray
> > +        Input image.
> > +    auto_clip : bool
>
> I agree that auto_clip isn't terribly clear, but positive is a little
> misleading because it only returns 0 for the min *if* the image doesn't
> have negative values.
>
> BTW, do you think should this parameter (whatever it's called) default to
> True. I think it should, but that's probably because I don't really use
> the negative range of images.
>
> —
> Reply to this email directly or view it on GitHub<https://github.com/scikit-image/scikit-image/pull/390/files#r3183010>
> .
>