Hi,

Since the NaryAddImageFilter generates an output image with an unknown number 
of bands, I guess you have to call its UpdateOutputInformation() so that the 
downstream filters (and therefore the writer) know what to do.

Jordi

Poughon Victor <victor.poug...@cnes.fr> wrote:
> 
> Hi
>
> I am writing an OTB application and getting the following error at runtime:
>
>     itk::ERROR: GDALImageIO(0xc35a30): Dimensions are not defined.
>
> Any ideas what it means?
> Here is the DoExecute of my (very simple) application. i think the problem 
> comes from the way I am using itk::NaryAddImageFilter, but I don't know:
>
>     FloatVectorImageListType::Pointer inList = GetParameterImageList("il");
>
>     std::vector<ExtractChannelType::Pointer> 
> extractChannelFilters(inList->Size(), NULL);
>     NaryAddImageFilterType::Pointer naryAdder = NaryAddImageFilterType::New();
>
>     // For each input image
>     for (unsigned int i = 0; i < inList->Size(); i++)
>     {
>       // Extract first band
>       extractChannelFilters[i] = ExtractChannelType::New();
>       extractChannelFilters[i]->SetInput(inList->GetNthElement(i));
>       extractChannelFilters[i]->SetChannel(1);
>
>       // Add it
>       naryAdder->SetInput(i, extractChannelFilters[i]->GetOutput());
>     }
>
>     // Divide by N
>     MultiplyImageFilterType::Pointer divideFilter = 
> MultiplyImageFilterType::New();
>     divideFilter->SetInput(naryAdder->GetOutput());
>     divideFilter->SetConstant(1.0f/inList->Size());
>
>     // Write
>     SetParameterOutputImage("out", divideFilter->GetOutput());
>
>
> Thanks
>
>
> Victor Poughon
>
>
>
>
> -- 

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