[Numpy-discussion] PIL and NumPy

[Brady McCary]

NumPy Folks,

Sorry for the self-reply, but I have determined that this may have
something to do with an alpha channel being present. When I remove the
alpha channel, things appear to work as I expect. Any discussion on
the matter?

Brady

On Fri, Jul 12, 2013 at 10:00 PM, Brady McCary <brady.mccary at gmail.com> wrote:
> NumPy Folks,
>
> I want to load images with PIL and then operate on them with NumPy.
> According to the PIL and NumPy documentation, I would expect the
> following to work, but it is not.
>
>
>
> Python 2.7.4 (default, Apr 19 2013, 18:28:01)
> [GCC 4.7.3] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import numpy
>>>> numpy.version.version
>>>>
>>>> import Image
>>>> Image.VERSION
> '1.1.7'
>>>>
>>>> im = Image.open('big-0.png')
>>>> im.size
> (2550, 3300)
>>>>
>>>> ar = numpy.asarray(im)
>>>> ar.size
> 1
>>>> ar.shape
> ()
>>>> ar
> array(<PIL.PngImagePlugin.PngImageFile image mode=LA size=2550x3300 at
> 0x1E5BA70>, dtype=object)
>
>
>
> By "not working" I mean that I would have expected the data to be
> loaded/available in ar. PIL and NumPy/SciPy seem to be working fine
> independently of each other. Any guidance?
>
> Brady