[vtkusers] how to store label fields

[Dominik Szczerba]

I just checked that PV from CVS addresses exactly this issue, so I am
apparently not alone in my considerations. PV 3.4 will load a label
field and interpolate the colors when viewing slices (thus destroying
the image). PV CVS ignores interpolation settings and displays my labels
correctly (without interpolation). So I assume somebody realized the
problem recently too and corrected it. So I conclude that ImageData is
still the right choice for discrete label fields (and not
StructuredGrid), but one has to rely on the latest version. Please
correct me if I am wrong.

-- Dominik

On Wed, 2009-07-01 at 18:07 +0200, Dominik Szczerba wrote:
> When storing my label field as imagedata I get unwanted interpolation if
> I e.g. cut through the volume. Switching the interpolation off results
> in funny bad looking triangles. What's the best/intended/practiced way
> of storing (integer) label fields? Image data is point centered while
> label fields are clearly cell centered. As I see the only alternative is
> StructuredGrid, but functions like contouring or resampling require
> point data anyway. So what's better: store my labels as image (point)
> data and compromise display (unwanted interpolation) or go for
> structured grid and compromise size of the file and needed conversions
> to image data anyway?
> 
> -- Dominik
> 
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