[Insight-users] GradientRecursiveGaussianImageFilter

[Luis Ibanez]

Hi Joanna,

Please put the call to Update() inside a try/catch block
and post to the list the message produced by the
Exception.

You will find many examples on how to do this in the
ITK Software Guide:

    http://www.itk.org/ItkSoftwareGuide.pdf

The code will look like:

    try
      {
      gradientFilter->Update();
      }
   catch( itk::ExceptionObject & excp )
     {
     std::cerr << excp << std::endl;
     }

---

If you only need to compute derivative in
certain points of the image, you may want
to use one of the following classes:

* ./Common/itkGaussianDerivativeImageFunction.h
* ./Common/itkGaussianDerivativeSpatialFunction.h
* ./Review/itkDiscreteGaussianDerivativeImageFunction.h



   Regards,


        Luis


-----------------------------------
On Sun, Jan 24, 2010 at 5:05 AM, joanna ZHU <joannajello at gmail.com> wrote:
> Hello, dear all.
>
> I am trying to use GradientRecursiveGaussianImageFilter,  but there is
> exception while running. I am thinking may be it is out of memory  since the
> size of the image is 512*512*272.  I am wondering is there any other filters
> that I could use instead of this one. Actually, I just want to use the
> gradient vector of a few points. Is there a better way to calculate the
> gradient vector. Thanks a lot.
>
> Best Regards,
>
> Joanna
>
>
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