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

[Arnaud Gelas]

Hi guys,

Thanks for all your replies!

I also definitively agree with Brad, I think we should add the grid illustration to the PadImageFilter doxygen pages.

Here is a patch on gerrit:

	http://review.source.kitware.com/#/c/14604/

Not sure what would be the best caption though, but we can discuss about it on gerrit.

Best,
Arnaud

On Mar 3, 2014, at 3:56 PM, "Johnson, Hans J" <hans-johnson at uiowa.edu> wrote:

> I definitely agree with Brad regarding using the grid illustration method.
> I¹ve found that it is less ambiguous.
> 
> Hans
> 
> 
> On 3/3/14, 7:54 AM, "Bradley Lowekamp" <blowekamp at mail.nih.gov> wrote:
> 
>> Arnaud,
>> 
>> The filters are correct. The figures on the Doxygen page should be
>> updated though:
>> 
>> http://www.itk.org/Doxygen/html/classitk_1_1PadImageFilter.html
>> 
>> These filters are similar to the ExtractImageFilter, in that the Origin
>> stays the same but the starting index changes. Looking back at the figure
>> in Doxygen the origin should be placed at the corner of the red box in
>> both images.
>> 
>> Speaking of images to illustrate algorithms, I prefer the image grid
>> illustrating many of these geometry concepts over the block done for the
>> PadFilter like I did here:
>> 
>> http://www.itk.org/Doxygen/html/classitk_1_1BinShrinkImageFilter.html
>> 
>> Let me know what you think will be the most informative way to illustrate.
>> 
>> Brad
>> 
>> 
>> On Mar 3, 2014, at 6:03 AM, Cory Quammen <cory.quammen at kitware.com> wrote:
>> 
>>> 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
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