io.imsave() problems with passing arguments to plugin "freeimage"

[Zachary Pincus]

This is very curious. You have two arrays of identical dtype (that is, "two" and "summation"), and one can be saved via freeimage yet the other cannot? Is this correct?

Hopefully someone can try to verify this. Strange, too, that it would fail on XP but work on Win 7 32-bit. Perhaps that's a red herring and it has to do with the EPD version?


On Jul 12, 2012, at 8:41 AM, Sigmund wrote:

> 
> 
> On Wednesday, July 11, 2012 2:50:11 PM UTC+2, Zachary Pincus wrote:
> I wonder if this has to do with the type-promotion behavior changes in a recent numpy version? What is the dtype of "summation" below? 
> 
> two.dtype and summation.dtype return "int32"  .dtype.type is returning "<type 'numpy.int32'>" in both cases.
> I just tried it on a diffrent PC. Same problem on a Win32 XP 32bit system with EPD 7.2-2 Python 2.7.2
> 
> In summary.
> It is working on :
> Python 2.7.1 |EPD 7.0-2 (32-bit)| Win 7 32
> Python 2.7.2 |EPD 7.2-2 (64-bit)| Mac OSX
> And not working on:
> Python 2.7.3 |EPD 7.3-1 (64-bit)| Win 7 64
> Python 2.7.2 IEPD 7.2-2 (32-bit)| Win XP
> 
> On Jul 10, 2012, at 9:35 AM, Sigmund wrote: 
> 
> > Hey! 
> > 
> > Whil writing the test code I found out that saving the array by itself doesn't cause the error. Only after summing two arrays it fails. 
> > 
> > import numpy as np 
> > import skimage.io as io 
> > io.use_plugin("freeimage", "imread") 
> > one = np.ones([2048,2048],dtype=np.int32) 
> > two = np.zeros([2048,2048],dtype=np.int32) 
> > summation = one + two 
> > io.imsave("test.tif",summation, plugin="freeimage") 
> > 
> >  not using the freeimage plugin in not failing. 
> > 
> > Siggi 
> 
>