[Insight-users] itk::ChangeLabelImageFilter

[Gaetan Lehmann]

On Wednesday 07 June 2006 20:56, Atwood, Robert C wrote:
> Why would you NOT relabel the image after the watershed? :-0
>
>
> But, I use itk::RelabelComponentImageFilter to get a compact numbering
> scheme and useable data type.
>

Yes, the most simple method is to use RelabelComponentImageFilter, but Henning 
is not doing that - that's why I'm asking this question :-)
ChangeLabelImageFilter is useful only if we want some specific labels

>
>
>
> -----Original Message-----
> From: insight-users-bounces+r.atwood=imperial.ac.uk at itk.org
> [mailto:insight-users-bounces+r.atwood=imperial.ac.uk at itk.org] On Behalf Of
> Gaetan Lehmann Sent: 07 June 2006 19:49
> To: Henning Meyer
> Cc: insight-users at itk.org
> Subject: Re: [Insight-users] itk::ChangeLabelImageFilter
>
>
> I'm not using it this way. I use
>
>   changeLabel->SetChange( wit.Get(), mit.Get() );
>
> instead of passing a map to the filter with SetChangeMap(). The full code
> is here:
>
> http://voxel.jouy.inra.fr/darcs/contrib-itk/watershed/iwsm.cxx
>
> See if it work for you this way.
> Funny to see you are also doing it after a watershed. Can I ask you why you
> are relabeling your image after the watershed ?
>
> Gaetan
>
> On Wednesday 07 June 2006 16:15, Henning Meyer wrote:
> > I see. But what do I do wrong:
> >
> > This works:
> >
> > 	ChangeLabelFilterType::ChangeMapType changeMap;
> > // some code to set the map
> > 	LabeledImageIteratorType watershedIt( watershedImage,
> > watershedImage->GetBufferedRegion() );
> > 	for(watershedIt.GoToBegin(); !watershedIt.IsAtEnd(); ++watershedIt)
> > 		watershedIt.Set( changeMap[ watershedIt.Get() ] );
> >
> > But this does not:
> > 	ChangeLabelFilterType::Pointer labelChanger =
> > ChangeLabelFilterType::New(); labelChanger->SetInput( watershedImage );
> > 	labelChanger->SetChangeMap( changeMap );
> > 	labelChanger->Update();
> > 	LabeledImageType::Pointer labelChangedImage = labelChanger->GetOutput();
> >
> > Thanks for your help!
> >
> > Henning
> >
> > 2006/6/7, Gaetan Lehmann <gaetan.lehmann at jouy.inra.fr>:
> > > Hi,
> > >
> > > The ChangeLabelImageFilter works without problem (for me).
> > > Most of the code is in the functor declared in the header: this filter
> > > use the UnaryFunctorImageFilter to simplify its implementation.
> > >
> > > Gaetan
> > >
> > >
> > > On Wed, 07 Jun 2006 15:36:52 +0200, Henning Meyer <tutmann at gmail.com>
> > >
> > > wrote:
> > > > Hello,
> > > >
> > > > maybe a stupid question:
> > > > Does itk::ChangeLabelImageFilter (ITK 2.6) do anything usefull at
> > > > all? The source just looks like an empty template generated filter.
> > > >
> > > > Did I do something wrong?
> > > >
> > > > Thanks for your help!
> > > >
> > > > Henning
> > > > _______________________________________________
> > > > Insight-users mailing list
> > > > Insight-users at itk.org
> > > > http://www.itk.org/mailman/listinfo/insight-users
> > >
> > > --
> > > Gaëtan Lehmann
> > > Biologie du Développement et de la Reproduction
> > > INRA de Jouy-en-Josas (France)
> > > tel: +33 1 34 65 29 66    fax: 01 34 65 29 09
> > > http://voxel.jouy.inra.fr
>
> _______________________________________________
> Insight-users mailing list
> Insight-users at itk.org
> http://www.itk.org/mailman/listinfo/insight-users
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 191 bytes
Desc: not available
Url : http://public.kitware.com/pipermail/insight-users/attachments/20060607/d818b73c/attachment.pgp