[Insight-users] Easy way to find gradient of an image at a particular index?

[Cory Quammen]

Thanks, Brian. Three lines works for me!

Cory


On Sat, Dec 1, 2012 at 6:36 AM, brian avants <stnava at gmail.com> wrote:

> never a 2-liner unless you use simpleitk ....
>
> typedef CentralDifferenceImageFunction<FixedImageType>
> GradientCalculatorType;
> m_FixedImageGradientCalculator = GradientCalculatorType::New();
> m_FixedImageGradientCalculator->SetInputImage( this->GetFixedImage() );
> gradient = m_FixedImageGradientCalculator->EvaluateAtIndex( index );
>
> brian
>
>
>
>
> On Fri, Nov 30, 2012 at 4:14 PM, Cory Quammen <cquammen at cs.unc.edu> wrote:
> > Hi all,
> >
> > I could dig in the documentation for this, but am hoping someone on the
> list
> > just knows off the top of his or her head.
> >
> > I'd like to compute the gradient of a 3D image given an index. Is there a
> > one- or two-liner to do this in ITK? I'd like to avoid computing the full
> > gradient image.
> >
> > Thanks,
> > Cory
> >
> > --
> > Cory Quammen
> > Research Associate
> > Department of Computer Science
> > The University of North Carolina at Chapel Hill
> >
> >
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-- 
Cory Quammen
Research Associate
Department of Computer Science
The University of North Carolina at Chapel Hill
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