[Insight-users] Eigenvector computation of Image Hessian

[Srikrishnan V]

  On 7/8/2010 2:19 PM, Ivan Macia wrote:
> Hi Krishnan,
>
> The code that uses the functor should be attached in one of my recent 
> posts.
>
> Best regards
>
> Ivan
>
> 2010/7/8 Krishnan V <v.srikrishnan at gmail.com 
> <mailto:v.srikrishnan at gmail.com>>
>
>     Hi Karthik,
>     Thanks for the reply. I do not know enough C++ to write functors
>     so will probably iterate over the image stack; should be quite
>     slow though.
>     krishnan
>
>
>     On Wed, Jul 7, 2010 at 9:13 PM, Karthik Krishnan
>     <karthik.krishnan at kitware.com
>     <mailto:karthik.krishnan at kitware.com>> wrote:
>
>         Take a look at the class itk::SymmetricEigenAnalysis. The
>         method "ComputeEigenValuesAndVectors" computes the eigen
>         vectors as well as the eigen values for your ND matrix  pixels
>         (the hessians)
>
>         You could write a functor just like
>         itk::SymmetricEigenAnalysisImageFilter does to run this over
>         all the pixels and generate the eigen vector images.
>
>         --
>         karthik
>
>
>         On Wed, Jul 7, 2010 at 5:49 PM, Krishnan V
>         <v.srikrishnan at gmail.com <mailto:v.srikrishnan at gmail.com>> wrote:
>
>             Hi,
>             I am using SymmetricEigenAnalysisImageFilter to compute
>             the eigen values and vectors of the Hessian. I saw the
>             sample code for Curve3DExtraction as well as previous
>             posts which talk about eigen value extraction but none on
>             extracting the eigenvectors. I looked at the documentation
>             but cannot find anything which will get the vectors. Maybe
>             I am missing something elementary but it will be great if
>             someone can help.
>             Thanks
>             Krishnan
>
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Hi,
Thanks for the information. I will look it up.
krishnan
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