[Insight-users] Eigenvector computation of Image Hessian

[Ivan Macia]

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>

> 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> 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>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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>
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