[ITK-users] FastMarching UpwindGradient Filters difference

[Arnaud Gelas]

Hi Brad,

FastMarchingUpwindGradientImageFilter is from ITKv3 while the other one is from ITKv4. Note that in terms of features, FastMarchingUpwiindGradientImageFilter would be a subset of the “Base" one…

Arnaud



> On 21 Jan 2015, at 15:09, Bradley Lowekamp <blowekamp at mail.nih.gov> wrote:
> 
> Hello,
> 
> I am trying to figure out the difference between the FastMarchingUpwindGradientImageFilterBase[1] and the FastMarchingUpwindGradientImageFilter[2].
> 
> The first thing to notice is that the "Base" class is NOT a parent of the other. Secondly, the non-Base implements a stopping criteria of reaching  a number of target nodes. This is now incorporated as an optional stopping criteria [3], in the framework. Then both of the filters add the upwind gradient image as an output, with what appears to be duplicated code. 
> 
> I don't see a real difference here. I think one should be deprecated.
> 
> Brad
> 
> [1] http://www.itk.org/Doxygen/html/classitk_1_1FastMarchingUpwindGradientImageFilterBase.html
> [2] http://www.itk.org/Doxygen/html/classitk_1_1FastMarchingUpwindGradientImageFilter.html
> [3] http://www.itk.org/Doxygen/html/classitk_1_1FastMarchingReachedTargetNodesStoppingCriterion.html