[Neuroimaging] Nibabel API change - always read as float

[Brendan Moloney]

> Yes, I guess you would have to either go through float64 or handle the
> scaling yourself.  But isn't that just:
> 
> data = data.astype(np.float32) * scale + inter?

If you just want your code to work with Nifti then I think the full code would be something like:

data = img.get_data(as_float=False)
slope = img.dataobj.slope
if np.isnan(slope) or slope == 0:
    slope = 1.0
inter = img.dataobj.inter
if np.isnan(inter):
    inter = 0.0
data = data.astype(np.float32) * scale + inter

If you want your code to work with other image types besides Nifti I guess this gets slightly more complex.