Re: [Matplotlib-users] Why so different from Matlab to matplotlib (fft2 question)?

[Jay P. <pa...@gm...>]

On 1/26/07, John Hunter <jdh...@ac...> wrote:
> >>>>> "Darren" == Darren Dale <dd...@co...> writes:
>
>     Darren> vmin and vmax dont seem to have any effect on the
>     Darren> resulting image, at least on my machine with the most
>     Darren> recent svn.
>
> I haven't looked at his data or the output if fftshift.  if vmin and
> vmax do nothing, mpl is probably interpreting his image as RGB or
> RGBA, which it would do if the output is MxNx3 or MxNx4 and thus would
> not be applying scaling or color mapping.  When using svn, vmin and
> vmax do behave as expected in my test code:

That's the problem, I believe. 'imread' in mpl always reads images in
as MxNx4, while Matlab will check if the image is B&W and just do MxN.
Is there any way to force MxN behaviour in mpl?

Jay P.