[Insight-users] Passing a vector image from itk to vtk

[Karthik Krishnan]

Probably the documentation is old.
Yes you can do this.
You can instantiate an image of type itk::RGBPixel and pass it through 
to VTK with VTKImageExport.

Joel Schaerer wrote:

> Hi all,
>
> I need to pass vector images (that is, 3 components) from itk back to 
> vtk for visualisation. The problem is that this operation is 
> apparently unsupported by itk at the moment:
>
> From the itk documentation: "Currently VTKImageExport does not support 
> pixel types with multiple components (like RGBPixel)."
>
> I suppose the reason it wasn't done is that it would require to 
> actually scan and convert the image in memory, and implementing it 
> seems pretty complex.
>
As you've mentioned the constraint of scanning and converting the image 
in memory still holds, so the image has got to be a multi-component 
image with all the pixel values contiguously placed as in
ImagePixel0Component_0 ImagePixel0Component_1 ImagePixel0Component_2 ... 
ImagePixel0Component_n ImagePixel1Component_0 .........n

> Two questions:
>
> 1) Does anybody have code to do this?
>
InsighthtApplications/Auxiliary/vtk/itkReadITKImageShowVTK.cxx

> 2) What would be the best/easiest way to do it?
>
> thanks!
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