[Insight-users] Help with "Requested region is outside largest possible region"

[Stephen R. Aylward]

Hi,

I think Julien fixed this in the CVS version.   Are you using a checkout 
from within the past week?

Stephen

Parag Chandra wrote:
> Hi,
> 
>  
> 
> I am getting the error above every time I try to reuse a filter with an 
> image that is smaller than the image I previously processed with that 
> filter. For example,
> 
>  
> 
> typedef itk::Image<double, 2>  ImageType;
> 
> typedef itk::ImageFileReader<ImageType>  ImageReaderType;
> 
> typedef itk::ImageFileWriter<ImageType>  ImageWriterType;
> 
> typedef itk::NormalizeImageFilter<ImageType, ImageType>  FilterType;
> 
> ImageReaderType::Pointer reader = ImageReaderType::New();
> 
> ImageWriterType::Pointer writer = ImageWriterType::New();
> 
> FilterType::Pointer filter = FilterType::New();
> 
>  
> 
> // Block 1
> 
> reader->SetFileName("beam6.mha");
> 
> filter->SetInput(reader->GetOutput());
> 
> writer->SetInput(filter->GetOutput());
> 
> writer->SetFileName("image1.mha");
> 
> writer->Write();
> 
>  
> 
> // Block 2
> 
> reader->SetFileName("beam8.mha");
> 
> writer->SetFileName("image2.mha");
> 
> writer->Write();
> 
>  
> 
> The first block executes with no problem. beam6.mha is 53x63 in size, 
> while beam8.mha is 50x63. The second block triggers an exception in 
> DataObject::PropagateRequestedRegion because 
> ImageBase::VerifyRequestedRegion returns false. For some reason, the 
> second time the filter is run it uses the same requested region as the 
> first time it ran (53x63), but this time around, the image is only 
> 50x63. Does anyone know what is going on? I am using ITK release 1.2, so 
> if this has been fixed in CVS, please let me know what the workaround 
> is. Thanks.
> 
>  
> 
> Best regards,
> 
> Parag Chandra
> 


-- 
===========================================================
Dr. Stephen R. Aylward
Associate Professor of Radiology
Adjunct Associate Professor of Computer Science and Surgery
http://caddlab . rad . unc . edu
aylward at unc . edu
(919) 966-9695