[Insight-developers] New Bug

[Bradley Lowekamp]

Hello,

	I don't think this is a bug. If you look at how it works with the  
pipeline execution, for example in GenerateOutputInformation, this  
change would probably have horrible effects. In this case only the  
meta data information such as origin, spacing, size etc are updated,  
so that the down stream pipeline know about the image. The requested  
region get propagated in the next step. I really don't think this is a  
bug. I have always considered CopyInformation, UpdateOutputInformation  
etc, to refer to the meta data/information not the pipeline (requested  
region) or buffer information.

Brad

On Jan 13, 2009, at 3:42 PM, Hans Johnson wrote:

> Hello All,
>
> I’ve just submitted a new bug.  Please let me know if you there is a  
> reason why itk::ImageBase<>::CopyInformation should not be setting  
> the RequestedRegion and the BufferedRegion.
>
> 0008374: itkImageBase<>::CopyInformation does not set the Buffered  
> or the Requested Regions
> Description     I would have expected the following code to generate  
> an image with all 1's of the same size as readerImage.
>
> itk::Image<> readerImage=myreader->GetOutput();
>
> itk::Image<> OnesImage=itk::Image<>::New()
> OnesImage->CopyInformation(readerImage);
> OnesImage->Allocate();
> OnesImage->Fill(1);
>
> ===============
> The problem is that CopyInformation only sets the  
> LargestPossibleRegion, and not the BufferedRegion nor the  
> RequestedRegion.
>
> Additional Information
>
> I believe that CopyInformation needs to copy the BufferedRegion and  
> the RequestedRegion in addition to the LargestPossibleRegion.
>
>
> Thanks,
> Hans
>
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========================================================
Bradley Lowekamp
Lockheed Martin Contractor for
Office of High Performance Computing and Communications
National Library of Medicine
blowekamp at mail.nih.gov


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