[Insight-users] [ITK Community] PadImageFilter and image origin?

[Bradley Lowekamp]

I forgot to include the link to the code in my prior post:

https://github.com/InsightSoftwareConsortium/ITK/blob/master/Modules/Filtering/ImageGrid/include/itkPadImageFilter.hxx#L172



On Mar 3, 2014, at 8:35 AM, Loic Le Folgoc <loic.itk at gmail.com> wrote:

> Hi,
> 
> If the origin (physical coordinates of index (0,0)) has been kept the same, then it's likely the starting index of the padded image (GetLargestPossibleRegion().GetIndex()) that is modified accordingly. I'm pretty sure this filter works as intended but I don't have the code under my eyes to double-check.
> 
> However, I do think there are a couple of filters with possibly suspicious handling of the output starting index/origin. The InverseDisplacementFieldImageFilter comes to mind: I could be wrong, but it doesn't seem to handle the starting index of the output image at all, which then defaults to 0. Of course the user is free to change the spacing, origin and size of the output domain, but I guess the expected default behaviour would be (that of most ImageToImage filters) for the output to replicate the region/spacing/origin of the input to avoid possible loss of consistency.
> 
> Loïc 
> 
> Le 03/03/2014 12:03, Cory Quammen a écrit :
>> Arnaud,
>> 
>> That sounds like a bug. I would think the padding should affect the
>> origin so as to keep the original image content in the padded image to
>> be at the same physical location as the input.
>> 
>> Cory
>> 
>> On Mon, Mar 3, 2014 at 5:22 AM, Arnaud Gelas <arnaudgelas at gmail.com> wrote:
>>> Hi all,
>>> 
>>> Is it normal that the output image of a PadImageFilter (and derivatives) has the same origin as the input?
>>> 
>>> I just wonder if it is a bug, or not...
>>> 
>>> Thanks,
>>> Arnaud
>>> _____________________________________
>>> Powered by www.kitware.com
>>> 
>>> Visit other Kitware open-source projects at
>>> http://www.kitware.com/opensource/opensource.html
>>> 
>>> Kitware offers ITK Training Courses, for more information visit:
>>> http://www.kitware.com/products/protraining.php
>>> 
>>> Please keep messages on-topic and check the ITK FAQ at:
>>> http://www.itk.org/Wiki/ITK_FAQ
>>> 
>>> Follow this link to subscribe/unsubscribe:
>>> http://www.itk.org/mailman/listinfo/insight-users
>>> _______________________________________________
>>> Community mailing list
>>> Community at itk.org
>>> http://public.kitware.com/cgi-bin/mailman/listinfo/community
>> _____________________________________
>> Powered by www.kitware.com
>> 
>> Visit other Kitware open-source projects at
>> http://www.kitware.com/opensource/opensource.html
>> 
>> Kitware offers ITK Training Courses, for more information visit:
>> http://www.kitware.com/products/protraining.php
>> 
>> Please keep messages on-topic and check the ITK FAQ at:
>> http://www.itk.org/Wiki/ITK_FAQ
>> 
>> Follow this link to subscribe/unsubscribe:
>> http://www.itk.org/mailman/listinfo/insight-users
> 
> _____________________________________
> Powered by www.kitware.com
> 
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
> 
> Kitware offers ITK Training Courses, for more information visit:
> http://www.kitware.com/products/protraining.php
> 
> Please keep messages on-topic and check the ITK FAQ at:
> http://www.itk.org/Wiki/ITK_FAQ
> 
> Follow this link to subscribe/unsubscribe:
> http://www.itk.org/mailman/listinfo/insight-users

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.itk.org/pipermail/insight-users/attachments/20140303/8cb801d3/attachment.html>