[Insight-users] priors in itkBayesianClassifierImageFilter

[Karthik Krishnan]

sorry.. been busy.. Indeed you are right.. Please update again...

/cvsroot/Insight/Insight/Code/Algorithms/itkBayesianClassifierImageFilter.txx,v
 <--  itkBayesianClassifierImageFilter.txx
new revision: 1.11; previous revision: 1.10

I'll try and check in a test this weekend that exercises specifying a
prior vector image. (As Luis would say, If is not tested, it is
broken, and indeed it was :) )


On Tue, Dec 15, 2009 at 7:44 AM, Bruno Arbter
<bruno.arbter at isv.uni-stuttgart.de> wrote:
> Works fine up to the calculation of the posteriors with priors (line 205 in
> itkBayesianClassifierImageFilter.txx). I'm not very familiar with iterators
> up to now, but the posteriors cannot be accessed in this way
> (posteriors[i]=). Perhaps the variable needs some kind of memory allocation,
> doesn't it?
>
>> -----Ursprüngliche Nachricht-----
>> Von: Karthik Krishnan [mailto:karthik.krishnan at kitware.com]
>> Gesendet: Dienstag, 15. Dezember 2009 11:32
>> An: Bruno Arbter
>> Cc: insight-users at itk.org
>> Betreff: Re: [Insight-users] priors in itkBayesianClassifierImageFilter
>>
>> Thanks for catching this...
>>
>> Fix committed :
>>
>> /cvsroot/Insight/Insight/Code/Algorithms/itkBayesianClassifierImageFilt
>> er.h,v
>>  <--  itkBayesianClassifierImageFilter.h
>> new revision: 1.16; previous revision: 1.15
>> /cvsroot/Insight/Insight/Code/Algorithms/itkBayesianClassifierImageFilt
>> er.txx,v
>>  <--  itkBayesianClassifierImageFilter.txx
>> new revision: 1.10; previous revision: 1.9
>>
>> Update and please let us know..
>>
>> On Tue, Dec 15, 2009 at 5:10 AM, Bruno Arbter
>> <bruno.arbter at isv.uni-stuttgart.de> wrote:
>> > Okay, priors can be set via SetInput - but the flag
>> m_UserProvidedPriors in
>> > itkBayesianClassifierImageFilter remains false, and therefore the
>> priors are
>> > not used without changing the constructor.
>> >
>> > Is there an example that really uses priors?
>> >
>> > Thanks
>> > Bruno
>> >
>> >> -----Ursprüngliche Nachricht-----
>> >> Von: Karthik Krishnan [mailto:karthik.krishnan at kitware.com]
>> >> Gesendet: Montag, 14. Dezember 2009 14:14
>> >> An: Bruno Arbter
>> >> Cc: insight-users at itk.org
>> >> Betreff: Re: [Insight-users] priors in
>> itkBayesianClassifierImageFilter
>> >>
>> >> Take a look at Examples/Statistics/BayesianClassifier.cxx: and at
>> >> Examples/Statistics/BayesianClassifierInitializer.cxx:
>> >>
>> >> This class does have a method to set the priors. The prior image
>> >> expected (optionally as the second input) is a N component
>> >> VectorImage, where N is the number of classes. If the prior image is
>> >> not specified, a uniform distribution is taken, (ie no priors.).
>> >>
>> >> The API to do this is simply....
>> >>
>> >>    filter->SetInput( 1, priorVectorImage );
>> >>
>> >> This is documented clearly in the doxygen.
>> >>
>> >> Thanks
>> >> --
>> >> karthik
>> >>
>> >> On Mon, Dec 14, 2009 at 7:47 AM, Bruno Arbter
>> >> <bruno.arbter at isv.uni-stuttgart.de> wrote:
>> >> > I want to use itkBayesianClassifierImageFilter with priors but I
>> >> cannot find
>> >> > any function to set the priors (e.g. SetPriors) in the class
>> >> > itkBayesianClassifierImageFilter. How is the correct way to set
>> >> priors?
>> >> >
>> >> > Bruno
>> >> >
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>> >>
>> >>
>> >>
>> >> --
>> >> _________________________________
>> >> Karthik Krishnan
>> >> R&D Engineer,
>> >> Kitware Inc.
>> >> Ph: +1 5188814919, +91 9538477060
>> >
>> > _____________________________________
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>> >
>> > Visit other Kitware open-source projects at
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>>
>>
>> --
>> _________________________________
>> Karthik Krishnan
>> R&D Engineer,
>> Kitware Inc.
>> Ph: +1 5188814919, +91 9538477060
>
> _____________________________________
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>
> Visit other Kitware open-source projects at
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>
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> http://www.kitware.com/products/protraining.html
>
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-- 
_________________________________
Karthik Krishnan
R&D Engineer,
Kitware Inc.
Ph: +1 5188814919, +91 9538477060