Hi Lucia,
 the (admittedly obscure) reason why the spacing is ignored is that by default 
vmtk uses the ITK I/O factories to read images, while some of the options
are used in case you use 
-useitk 0
This should fix it.

On the other hand, you can (very elegantly) open the vti file with a text 
editor, change the spacing and save :-)

On my hand, I'll try to come up with a better way of enforcing the spacing even 
when one uses the default -useitk 1 option.

Best regards


Luca


On Mar 2, 2012, at 2:41 PM, Lucia Mirabella wrote:

> Hi Luca, hi all,
> 
> I'm trying to build a vti from a set of tiff images. Since the slice 
> thickness is different from the in-plane resolution, I would like to set the 
> correct spacing. I tried with
> 
> vmtkimagereader -f tiff -ofile image_volume.vti -ifile Segmented_00.tiff 
> -spacing 1.5625 1.5625 10
> 
> However image_volume.vti has the default spacing 1 1 1.
> 
> I also tried using 
> 
> vmtkimagereader -f tiff -ofile image_volume.vti -d ./prova/ -spacing 1.5625 
> 1.5625 10 -prefix Segmented_ -pattern %s%02d.tiff
> 
> but I get this error
> 
> Reading TIFF image file.
> ERROR: In /Users/vmtk/tmp7/VTK/IO/vtkTIFFReader.cxx, line 324
> vtkTIFFReader (0x7407aa0): Unable to open file Segmented_-1.tiff
> 
> So apparently it's looking for a file with a dash (instead of a 0) before the 
> number.
> 
> Do you have an idea on what I am doing wrong?
> 
> Thank you very much!
> 
> Lucia
> 
> 
> __________________________________________________
> 
> Postdoctoral Fellow, Cardiovascular Fluid Mechanics Laboratory
> Wallace H. Coulter Department of Biomedical Engineering
> Georgia Institute of Technology
> 315 Ferst Drive NW, Parker H. Petit Biotechnology Building
> Atlanta, GA 30332-0363
> E-mail: lucia.mirabe...@bme.gatech.edu
> 
> 
> 
> ------------------------------------------------------------------------------
> Virtualization & Cloud Management Using Capacity Planning
> Cloud computing makes use of virtualization - but cloud computing 
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Virtualization & Cloud Management Using Capacity Planning
Cloud computing makes use of virtualization - but cloud computing 
also focuses on allowing computing to be delivered as a service.
http://www.accelacomm.com/jaw/sfnl/114/51521223/
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