[Insight-users] PadImageFilter question

[Benjamin King]

------------7bA80ZJEuFvfCDi4x3qbSF
Content-Type: text/plain; charset=iso-8859-15; format=flowed

Hello James,

I tried to use the ChangeInformationImageFilter as you proposed, but the 
region indices are still different. Even worse is that the filter throws an 
exception when it is Update()d. I attached code that demonstrates the 
problem using two random images of different size.

I'm unsure whether my problems are based on a misconception about image 
regions. I read the documentation and I think that the 
LargestPossibleRegion should always have the index (0,0,0) because that 
index defines where the region starts in image coordinates. So I think that 
PadImageFilter should not return an output whose LargestPossibleRegion 
starts outside the image. Or should it?

Best regards,
  Benjamin


-- 
Benjamin King
Institut für Medizinische Informatik
Medizinische Hochschule Hannover
Tel.: +49  511  532-2663
------------7bA80ZJEuFvfCDi4x3qbSF
Content-Disposition: attachment;
	filename="DebugChangeInformationFilter.cpp"
Content-Type: application/octet-stream;
	name="DebugChangeInformationFilter.cpp"
Content-Transfer-Encoding: Base64
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------------7bA80ZJEuFvfCDi4x3qbSF--