[Insight-developers] GradientVectorFlowImageFilter internal image type

[Karthik Krishnan]

Gaëtan Lehmann wrote:
>   template <class TInputImage, class TOutputImage, class 
> TInternalPixel=double>
>   class ITK_EXPORT GradientVectorFlowImageFilter : public 
> ImageToImageFilter<TInputImage, TOutputImage>
>
> There shouldn't be any backward compatibility issue that way. I don't 
> know well that class though, so I have an important question:
> Does that change look reasonable? I mean, is it relevant to use a 
> different internal pixel type than double - float for example?
I don't think it makes sense to use the class with any internal pixel 
type other than float or double. Actually, the input images (and output 
images) supplied should also be float/double. The filter internally 
computes the laplacian image using the internal pixel type. Double 
precision is also needed to account for the diffusion of the gradient 
vectors.

I would just wrap the class for double and float alone.

thx
--
karthik
>
> Regards,
>
> Gaëtan
>
>
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-- 
Karthik Krishnan
R & D Engineer,
Kitware Inc,
Ph:  518 371 3971 x119
Fax: 518 371 3971