[Insight-users] How to make the input of a filter to its output

[Luis Ibanez]

Hi Pan,

If you want to take the output of a filter and connect it as
the input of the same filter, you should first call Update()
on the filter, then take its output and call DisconnectPipeline()
on the output. Something like

filter->SetInput( inputImage );
filter->Update();
ImageType::Pointer outputImage = filter->GetOutput();
outputImage->DisconnectPipeline();
filter->SetInput( outputImage );

This operation is interesting when you want to reuse
a filter in an iterative cycle.


Regards,

Luis

-------------------
Pan Ross wrote:

> I want to make the input of a filter to its output. But I do not know
> how to do it. I have write the following code, but there are some
> errors when I run the program. Could anyone help me?
> ImageType::Pointer workImage;
> workImage = imageReader->GetOutput();
> ...
> ...
> FlipFilterType::Pointer flip = FlipFilterType::New();
> flip->SetInput(workImage);
> FlipFilterType::FlipAxesArrayType flipAxesSet=flip->GetFlipAxes();
> flipAxesSet[1]=true;
> flip->SetFlipAxes(flipAxesSet);
> workImage = flip->GetOutput();
> the error is:
> itk::InvalidRequestedRegionError @ 0x0012eeec
>
>
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