[Insight-developers] image PixelType when using RegistrationMetricv4

[Nicholas Tustison]

Michael would probably have to weigh in to determine how much work that
would be but I'd be certainly open to something like that.  


On Jan 17, 2013, at 11:07 AM, Xiaoxiao Liu <xiaoxiao.liu at kitware.com> wrote:

> Hi Nick and Brian, 
> Thanks for the clarification.
> Maybe at least we could plug in a cast filter inside the optimizer  to internally use double, instead of requiring the input image types to be double? 
> 
> -Xiaoxiao
> 
> On Thu, Jan 17, 2013 at 10:59 AM, brian avants <stnava at gmail.com> wrote:
> hi nick , xiaoxiao
> 
> it's the optimization framework that forced this - michael stauffer
> did a pass through rewriting the optimization framework with a
> template parameter but this was nixed in one of the developer
> meetings.
> 
> agree that it's not ideal --- however, upside is that solutions should
> be more stable/precise, to state the obvious.
> 
> b
> 
> brian
> 
> 
> 
> 
> On Thu, Jan 17, 2013 at 10:55 AM, Nicholas Tustison <ntustison at gmail.com> wrote:
> > Yeah, this is a legacy issue that we need to address but I don't know how
> > easy it's going to be.  It's due to the fact that the transform framework
> > requires
> > double type which predates our work.  Brian, Michael and I will have to
> > discuss this to see if we can fix it or at least minimize the places where
> > double
> > is required.
> >
> > Nick
> >
> >
> > On Jan 17, 2013, at 10:50 AM, Xiaoxiao Liu <xiaoxiao.liu at kitware.com> wrote:
> >
> > Hi Nick,
> >    With the recent changes in the RegistrationMetricv4, seems that the
> > PixeType of an image needs to be always set to double?
> >    Old registration code  that with float type fails to compile, but runs
> > fine with double :
> > https://github.com/InsightSoftwareConsortium/ITKv4-TheNextGeneration-Tutorial/commit/20df5ac66d43061b5d1ca3665dd1712a5986a879
> >    The internal parameter measurements are using double, but is there a
> > reason to require the image type to be double as well? Am I missing
> > something?
> >    Please give me some pointers. Thanks.
> >
> > -- Xiaoxiao
> >
> >
> > ---------------------------------------------
> > Xiaoxiao Liu, Ph.D.
> > R & D Engineer
> > Kitware Inc.
> > Clifton Park, NY
> > Phone: (518) 881-4924  or  (518) 371-3971 x124
> >
> >
> >
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> 
> 
> -- 
> 
> 
> ---------------------------------------------
> Xiaoxiao Liu, Ph.D.
> R & D Engineer
> Kitware Inc.
> Clifton Park, NY
> Phone: (518) 881-4924  or  (518) 371-3971 x124
> 

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