[Insight-users] Principal Component Analysis

[Mark Redd]

Ok,
no one knows the answer, so I'll try to write my code without using ITK.
It's a pity not to have an appropriate documentation about all itk features.

goodbye



2009/9/25 Mark Redd <markredd85 at gmail.com>:
> Hi people,
> I'm finding many problems with PCA on medical images. In my student
> career, I used to read "the fucking manual" in order to solve my
> problems, but now I can't find it!
>
> There are several things I can't understand :
> 1) the difference between itkImagePCADecompositionCalculatorTest,
> itkImagePCAShapeModelEstimator and itkPCAShapeSignedDistanceFunction
> codes
>
> 2) why, in their Test files, they don't accept normal images but
> create some strange images (i think that they are created specifying
> something that isn't a set of grayscale pixel values)
>
> 3) why the only understandable code,
> itkActiveShapeModelCalculatorTest.cxx, doesn't give me the
> eigenvectors and eigenvalues, when I use model.mha and foot.mha as
> parameter, but only the mean shape coordinates.
>
> So I don't want you getting bored with all my troubles, but can you
> suggest a paper or something similiar that describe these topics? I
> haven't foud the right answers on the official documentation and
> doxygen is too synthetic to be understood by a newbie like me!
>
> I'd appreciate if someone could give some suggestions,
> Mark
>