[Insight-users] use itkFiniteDifferenceImageFilter

[Luis Ibanez]

Hi Elhadj,

The FiniteDifferenceImageFilter is designed as a base class:

http://www.itk.org/Doxygen/html/classitk_1_1FiniteDifferenceImageFilter.html

You should create a new filter that derives from it and in that
derived class you can re-implement several of its methods.

See for example, its derived class:

http://www.itk.org/Doxygen/html/classitk_1_1DenseFiniteDifferenceImageFilter.html

that in turn, is derived into:

http://www.itk.org/Doxygen/html/classitk_1_1CurvatureFlowImageFilter.html

Other examples are:

http://www.itk.org/Doxygen/html/classitk_1_1GradientAnisotropicDiffusionImageFilter.html
http://www.itk.org/Doxygen/html/classitk_1_1MinMaxCurvatureFlowImageFilter.html
http://www.itk.org/Doxygen/html/classitk_1_1VectorGradientAnisotropicDiffusionImageFilter.html
http://www.itk.org/Doxygen/html/classitk_1_1VectorCurvatureAnisotropicDiffusionImageFilter.html


Could you describe the type of Finite Differences
processing that you are trying to implement ?

It is likely that there are more specific image filters
already in ITK from which you could start your
implementation.


     Please let us know,


          Thanks


               Luis


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On Sun, May 2, 2010 at 5:39 PM, elhadj meljane <elhadj.meljane at gmail.com> wrote:
> Hi all,
> I try to use  itkFiniteDifferenceImageFilter to iterate with
> f_{n+1} = f_n +dt*A_n
> and I don't know how to introduce the A_n in this filter, I guess is done in
> the filter with ?
> FiniteDifferenceImageFilter<..>::GenerateData()
> {
> ...
> this->ApplyUpdate()
> ...
> }
>
> is there an itk simple example of an implemntation of the ApplyUpdate() and
> how to use it to iterate with this filter.
>
> Thanks,
> Elhadj,
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