[Insight-users] RequestedRegion and LargestPossibleRegion

[Mathieu Malaterre]

George,
	I recall having posted the very same question:

http://www . itk . org/pipermail/insight-users/2003-February/002615 . html

There should also be some posts before this one that mention the fact 
that FileWriter call UpdateWholeExtent so you have two options:

- Hack FileWriter and replace GetLargestPossibleRegion -> 
GetRequestedRegion.

- Use PasteImageFilter:
http://www . itk . org/Doxygen/html/classitk_1_1PasteImageFilter . html

Good luck
mathieu


Iordanescu, Gheorghe (NIH/CC/DRD) wrote:
> Hello everybody,
> 
>  
> 
> Here is my problem: I have a 3D data set (512x512x200) and I want to 
> process only a very small part of it (lets say 100x100x30) and save the 
> results as an image of the same dimensions (in pixels) as the input data 
> (i.e 512x512x200). Since I am not concerned with the rest of the image, 
> it could have any value (either the values of the input image or some 
> constant value)
> 
>  
> 
> What is the simplest way to process only a part of an image, but be able 
> to save the whole image?
> 
>  
> 
> Is there a way to fill the largest possible region of an image (of the 
> output of a filter) with some default value?
> 
> Should I use a blank image (filled with 0) of dimension 512x512x200 and 
> add to it somehow only the small output of the filter? Should I use an 
> iterator and fill only the non-filtered area of the image?
> 
>  
> 
> Thank you,
> 
>  
> 
> George
> 


-- 
Mathieu Malaterre
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