Hi Regine,
did you try inverting with vmtkimageshiftscale?
vmtkimageshiftscale -ifile input.mha -scale -1.0
If you need to re-obtain positive intensity levels for some reason, you need to
pipe another shift scale for the shift part:
vmtkimageshiftscale -ifile input.mha -scale -1.0 --pipe vmtkimageshiftscale
-shift 4000
Hope this helps.
Luca
On Mar 18, 2013, at 10:39 PM, richschm...@web.de wrote:
> Dear all,
>
> a friend of mine came up with a dicom data set of the lung. She wants to
> extract the trachea which is represented with a lower intensity as compared
> to their environment (since it is filled with air). We tried to use
> vmtklevelsetsegmentation, but it didn't work due to the inverted intensity
> distribution, I guess. I tried to invert the dicom data set and read it into
> vmtk afterwards, but I wasn't successful.
> Did anybody have the same problem and could tell me how he/she solved it?
> Thank you for any help!
> Bye,
> Regine
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