[Insight-users] NthElement Image output

[Bradley Lowekamp]

Hello,

If I needed to perform a dot product I would use the BinaryFunctor infrastructure.

You may be able to just use the MultiplyImageFilter, if the pixel's "*" operator is the dot product.

Otherwise, I'd create a new functor, and then use then the template parameters for the BinaryFunctorImageFilter.

Sample filter usage:
http://www.itk.org/Wiki/ITK/Examples/ImageProcessing/BinaryFunctorImageFilter

There are a lot of functor to choose from:
http://www.itk.org/Doxygen/html/namespaceitk_1_1Functor.html

Here is an example of a BinaryFunctor:
https://github.com/Kitware/ITK/blob/master/Modules/Filtering/ImageIntensity/include/itkAddImageFilter.h#L33

Brad


On Nov 5, 2013, at 8:02 PM, jmerkow <jmerkow at gmail.com> wrote:

> Thank You!  I didn't know this class existed. 
> I take it that this adapter is used to perform vector operations at the
> image level?
> My end goal is to perform a dot product of these gradients with a surface
> normal.  Is this adapter usually used in something like this fashion?
> 
> i.e. in combination with something like this:
> http://www.itk.org/Wiki/ITK/Examples/Math/DotProduct
> 
> 
> 
> Jameson
> 
> 
> 
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