[vtk-developers] Image filter to remap labels to new values

[David Thompson]

Hi David,

> ...I'm planning to add a new image filter to VTK, and will name it something like vtkImageMapThroughLUT.  The operation of this filter will be as follows:
> 
> - It will take, as input, any image that uses an integer scalar type
> - The scalars will be mapped though a lookup table to generate the output image
> 
> For the "lookup table" or (LUT), I was planning to use a plain-old vtkDataArray.  I cannot use vtkLookupTable as the LUT, since vtkLookupTable can only produce "unsigned char" output and is meant to be used for generating color data.
> 
> My question to the list is as follows: is vtkDataArray the best object to use for storing such a LUT?

You might consider vtkPiecewiseFunction (in Common/DataModel).

> Also, is there already a class in the VTK geometry pipeline that allows labels to be remapped to new label values via a LUT?

I don't know of any; what format are the labels in?

	David