On 31 May 2010 23:17, Angus McMorland <amcm...@gmail.com> wrote:
> On 31 May 2010 19:49, rugspin <piet_par...@web.de> wrote:
>
>>
>> I have a small problem how to convert an image from matplotlib to PIL
>>
>> right now doing somthing like this:
>> ------------------------------------------
>> from scipy import *
>> from pylab import *
>> from PIL import Image
>>
>> a = arange(16384).reshape(128,128)
>> imsave( "test.png", a, cmap=cm.summer,vmin=0,vmax=16383)
>> b = Image.open("test.png" )
>> ------------------------------------------
>>
>
> The Image.fromarray function should do what you want. For example,
>
> import numpy as np # note: use of "from foo import *"
> import Image # is discouraged where possible
>
> a = np.arange(128)[None,:] * np.ones(128)[:,None]
>
Sorry - I was playing around with a few iterations of this line, and didn't
provide the most useful one. Your example:
a = np.arange(128**2).reshape(128,128)
should also work fine.
> b = Image.fromarray(a)
> c = np.asarray(b)
> np.all(c == a)
> -> True
>
> I hope that helps,
>
> Angus.
>
--
AJC McMorland
Post-doctoral research fellow
Neurobiology, University of Pittsburgh
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