[vmtk-users] vmtkimagevoiselector -boxbounds : what's wrong?

[Giuseppe I. <giu...@gm...>]

Hi everebody,

I'm facing a geometry reconstruction task on vmtk. I need to reconstruct a
carotid bifurcation, but I'm experiencing some difficulties at the bulb
region. Generally I have an amazing image quality, I can easily segment
level sets for all branches (high meta levels within the lumen over  1000
and low levels otherwise), but due to blood recirculation  I have low
levels and kind of disturbed uneven image at the bulb. I tried to
initialize the segmentation in different ways but the result is always a
staired surface which follows the pixel level fluctuations in that region.

I thought to use vmtkimagevoiselector to divide my voi in three domains in
order to isolate the bulb volume, and then smooth the image only in the
bifurcation region.

The idea is to perform level set segmentation separately for the three
domains and then use vmtkimagecompose to reassemble my segmented volume.

A problem occurs when I pipe vmtkimagevoiselector. To obtain a precise
subdivision of the original volume I want to use -boxbounds insead of
interactive voi selection. I pipe this code:

vmtkimagevoiselector -ifile myname.vti -interactive 0 -boundbox xmin xmax
ymin ymax zmin zmax -ofile myoutput.vti --pipe vmtkimageviewer

but the output image results empty. what's wrong?  it seems to me to have
used the right pipe synthax.

Then if I omit the part "-interactive 0" I get the interactive option to be
enabled typing "i" and, again, empty image.


Can you give me any tip?

Thank you all

-- 
Giuseppe