[vtkusers] Cutting through different images

[Sebastian Klocke]

Hello,

I still got a problem when cutting through different images. I use 
vtkImageReslice to apply a cutting plane to different vtkImageData 
components, which I keep to have certain regions with a higher 
resolution than others.
When the cutting plane is outside of an vtkImageData component, I can 
hide the empty (black) cut with vtkLookupTable and vtkImageMapToScalars. 
But with some (oblique) cutting planes, a part of the result is black 
due to interpolation and I get small streaks of black between the cut 
results of the different images. I cannot solve this with MirrorOn() or 
vtkMirrorPad as this leads to too much information being duplicated and 
the result will contain information where none should be.
I'm searching for a way to add a margin to each vtkImageData, containing 
values from the neighbouring volume, maybe made transparent. That way, 
if there is no neighbour, the interpolation will occur with empty cells 
being taken into account, and if there is a neighbour, the interpolation 
will occur with the correct values. Does anyone have a solution or hints 
on how to do this?

Regards,
Sebastian