[Paraview] problems with ServerManagerConfiguration and vtkImageReslice

Fri May 20 03:31:44 EDT 2011

It is definitively not an out-of-memory problem!!
Your data makes my paraview crashed too, but not only. I tried with a vtk
python script (thus nothing to do with paraview) and the same occurs.

The reason comes from the way your Image.vti is built: the output of the
vtkXMLImageDataReader contains one PointData array, but scalars are not
set. You have to write somewhere when you build your image something like
that :
   myImage->GetPointData()->SetScalars(
myImage->GetPointData()->GetArray(0))

For a ParaView-exclusive solution, just plug a Calculator after the
Image.vti source
and set the operation to "FractalIterations" only. It will set properly the
output scalars.

HTH
Jerome

2011/5/20 Dominik Szczerba <dominik at itis.ethz.ch>

> Hi,
>
> My data is here, I would be glad if you tried it out.
>
> http://otoro.itis.ethz.ch/~dominik/tmp/Image.vti
>
> My ParaView is several days old git.
>
> Thanks and regards,
> Dominik
>
> On Fri, May 20, 2011 at 8:51 AM, Jérôme <jerome.velut at gmail.com> wrote:
> > I don't have any problem running Median or Gradient on image of type
> > double. If you are allowed to share your data, I may give a try here.
> >
> > Maybe are you running out of memory? You can try to extract a subset
> > of your data and see if the segfault occurs.
> >
> > Jerome
> >
> > 2011/5/20 Dominik Szczerba <dominik at itis.ethz.ch>
> >>
> >> Hi Jerome,
> >>
> >> Thanks for the references, but there does not to be any solution in
> there?
> >> And yes, "strange extents" are also taking place in some cases, i.e.,
> >> extents are actually correct, but the content of the image data is
> >> smaller if the new spacing is finer than the original.
> >> Due to the lack of detailed description of this whole mechanism I can
> >> not say if this is my lack of knowledge or a bug.
> >>
> >> Regarding segfaults, the only non-standard thing I can say about my
> >> input image data is that it contains a scalar type "double". The said
> >> filters will work with image generated by Sources/Wavelet, but the
> >> type of that one is float. I am afraid something is hardcoded
> >> somewhere.
> >>
> >> Regards,
> >> Dominik
> >>
> >> On Fri, May 20, 2011 at 8:25 AM, Jérôme <jerome.velut at gmail.com> wrote:
> >> > Hi,
> >> > regarding the vtkImageSlice exposition in ParaView, you should take
> >> > a look at these threads:
> >> > - issue report:
> >> >    http://www.mail-archive.com/paraview@paraview.org/msg02225.html
> >> >    http://www.mail-archive.com/paraview@paraview.org/msg08260.html
> >> > - issue deep explanation:
> >> >    http://www.cmake.org/pipermail/paraview/2010-June/017738.html
> >> >
> >> > regarding the segfault, I feel surprise ! I use Median and Gradient
> very
> >> > often, and I never noticed a bug. Can you give the step to reproduce ?
> >> >
> >> > Best regards,
> >> > Jerome
> >> >
> >> >
> >> > 2011/5/19 Dominik Szczerba <dominik at itis.ethz.ch>
> >> >>
> >> >> I think my theory that it has to do with threading may be correct...
> >> >>
> >> >> I just tried instead of my custom plugin to run the built-in Gradient
> >> >> or Median on my vtkImageData and Paraview (3.11) silently segfaults.
> >> >> Both these built-in filters derive from vtkThreadedImageAlgorithm.
> >> >> Built-in vtkExtractVOI. however, works correctly, just as my other
> >> >> custom plugins deriving from vtkImageAlgorithm.
> >> >>
> >> >> Any pointers in this bug hunting are appreciated.
> >> >>
> >> >> Dominik
> >> >>
> >> >> On Thu, May 19, 2011 at 9:30 PM, Dominik Szczerba
> >> >> <dominik at itis.ethz.ch>
> >> >> wrote:
> >> >> > So far I was able to add a few simple custom plugins, but am slowly
> >> >> > losing the grip.
> >> >> > I am trying to resample an image like this:
> >> >> >
> >> >> > <SourceProxy name="ImageResample" class="vtkImageResample"
> >> >> > label="ImageResample">
> >> >> > <InputProperty name="Input" command="SetInputConnection">
> >> >> >        <ProxyGroupDomain name="groups">
> >> >> >                <Group name="sources"/>
> >> >> >                <Group name="filters"/>
> >> >> >        </ProxyGroupDomain>
> >> >> >        <DataTypeDomain name="input_type">
> >> >> >                <DataType value="vtkImageData"/>
> >> >> >        </DataTypeDomain>
> >> >> > </InputProperty>
> >> >> > <DoubleVectorProperty name="Magnification Factor"
> >> >> > command="SetAxisMagnificationFactor" number_of_elements="3"
> >> >> > number_of_elements_per_command="1" repeat_command="1" use_index="1"
> >> >> > default_values="1 1 1"/>
> >> >> >
> >> >> > I get these 2 problems:
> >> >> >
> >> >> > 1) There appear two (!) outputs (named Output-0 and Output-1). I
> get
> >> >> > this message:
> >> >> >
> >> >> > ERROR: In
> >> >> > /home/dsz/pack/ParaView/VTK/Filtering/vtkDemandDrivenPipeline.cxx,
> >> >> > line 827
> >> >> > vtkPVPostFilterExecutive (0x3aa4f60): Input for connection index 0
> on
> >> >> > input port index 0 for algorithm vtkPVPostFilter(0x2cfb850) is of
> >> >> > type
> >> >> > vtkImageStencilData, but a vtkDataSet is required.
> >> >> >
> >> >> > 2) The first output has the expected Spacing, but it does not
> contain
> >> >> > the same scalar array as in the input. Instead, it contains a new
> >> >> > array ImageScalars ranging [0,0]. I get this message:
> >> >> >
> >> >> > Warning: In
> >> >> >
> >> >> >
> /home/dsz/pack/ParaView/ParaViewCore/VTKExtensions/vtkTexturePainter.cxx,
> >> >> > line 179
> >> >> > vtkTexturePainter (0x339fa70): Failed to locate selected scalars.
> >> >> > Will
> >> >> > use image scalars by default.
> >> >> >
> >> >> > I have been so far successful with other image algorithms, however
> >> >> > they were all deriving from vtkImageAlgorithm. This one derives
> from
> >> >> > vtkThreadedImageAlgorithm - could this have anything to do here?
> >> >> > Could anyone point me into the right direction? After inspection of
> >> >> > the xml files in the ParaView source tree I am still clueless.
> >> >> >
> >> >> > Thanks and regards,
> >> >> > Dominik
> >> >> >
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> >
> >
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