[Paraview] Feature Request: vtkImageResample

[Jérôme]

Hi,

I tried to do what you talked about, because I need isotropic volumes
for a number of algorithms. I think it is the same for you, right?

I wrote an xml file that you can load in the plugin manager menu,
according to this wiki page:
   http://paraview.org/Wiki/Plugin_HowTo#Enabling_a_filter_in_VTK

The problem is that the VTK filter seems not to be paraview-compliant:
it didn't work, but unfortunately I didn't have time to describe the
bugs. I joint the xml file, so that you can try and please tell me if
it works for you -then I may guess it is because of my settings...-.

In a nutshell, here are my problems for a volume of spacing 0.5x0.5x1
that I want to be 0.5x0.5x0.5 ie magnification factor = 0.5 on axis z
(= 2)
- The filter updates, but the extent does not change in the output
- When representation of input is 'Slice', the output dimensionality is 2 !!!

I hope someone could find the mistake, wherever it comes (my xml,
paraview, or VTK)

I also write a Cxx class that inherites from vtkImageResample and
computes automatically the magnification factor depending on a
user-chosen reference axis (in my example, x or y). Today, I use an
independent executable that converts an input mhd file into an
isotropic volume, and then I open it in paraview. I would be glad if
this step is part of a paraview pipeline, but my inherited class has
the same behaviour than vtkImageResample (and I think that when I
tried with the parent class vtkImageReslice, the same problem
occured...).

Jerome

2009/1/30 Bryn Lloyd <blloyd at vision.ee.ethz.ch>:
> Dear VTK Developers
>
>
> I would like to use the vtkResampleImage class in Paraview (plugin). For
> this purpose it would be helpful if in addition to the methods
>
> SetAxisMagnificationFactor (int axis, double factor)
> SetAxisOutputSpacing (int axis, double spacing)
>
>
> which are valid for axis 0,1 and 2, following new functions could be added:
>
> SetAxisMagnificationFactor (double, double, double)
> SetAxisOutputSpacing (double, double, double)
>
>
> i.e. taking values for all three axis directions simultaneously.
>
>
> Could this be done?
>
>
> Thanks in advance!
>
> Bryn
>
>
>
>
> --
> -------------------------------------------------
> Bryn Lloyd
> Computer Vision Laboratory
> ETH Zürich, Sternwartstrasse 7
> CH - 8092 Zürich, Switzerland
> Tel: +41 44 63 26668
> Fax: +41 44 63 21199
> -------------------------------------------------
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