[Insight-users] Iterators: PROBLEM

[Daniela Sacchetto]

Thanks Sergiy!!

The problem was the manually created image Dsk; I change the lines as you said me and now it runs perfectly.

Regards,
Daniela

> Date: Fri, 6 Aug 2010 22:16:48 -0700
> From: volkovych at gmail.com
> To: insight-users at itk.org
> Subject: Re: [Insight-users] Iterators: PROBLEM
> 
> 
> I think the problem appears when the program tries to increment one of the
> iterators.
> Try to replace the "for" line to this:
> 
> for (DskIt.GoToBegin(), DFltIt.GoToBegin(),
> DSubIt.GoToBegin();!DskIt.IsAtEnd() && !DFltIt.IsAtEnd() &&
> !DSubIt.IsAtEnd(); ++DskIt, ++DFltIt, ++DSubIt)
> 
> If it doesn't go to the internal part of the loop at all, it means that one
> of your images is empty (the region wasn't allocated properly). You may
> identify which iterator creates a problem by:
> 
> DskIt.GoToBegin();
> if (DskIt.IsAtEnd())
>   std::cerr << "Not ok ;-("<< std::endl;
> 
> If the problem appeared due to the manually created image Dsk, try to
> allocate it with this lines:
> 
> ImageType::Pointer Dsk = ImageType::New(); 
> Dsk->SetRegions(DFlt->GetLargestPossibleRegion()); 
> Dsk->Allocate();
> 
> But be aware that DFlt and DSub images should already have been filled by
> the values before doing it.
> 
> Also you may initialize iterators based on the LargestPossibleRegion:
> 
> IteratorType DskIt (Dsk, Dsk->GetLargestPossibleRegion()); 
> ConstIteratorType DFltIt (DFlt, DFlt->GetLargestPossibleRegion()); 
> ConstIteratorType DSubIt (DSub, DSub->GetLargestPossibleRegion()); 
> 
> If it still doesn't work, please, place the larger part of code (I want to
> see how all images are obtained to be sure that you haven't errors in the
> other part of code).
> 
> Sergiy.
> -- 
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> Sent from the ITK Insight Users mailing list archive at Nabble.com.
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