[vtkusers] vtkMarchingCubes

Fri Apr 25 10:56:35 EDT 2003

Marwan,
	I am CCing the vtk list even if I think almost everybody knows about 
ITK...just in case someone fall asleep ;)

The main web site is http://itk.org
You'll find there how to download/use/suscribe to mailing list, etc.

The main documentation:
http://itk.org/ItkSoftwareGuide.pdf
Beware: 4517kBytes, more than 300 pages, somewhat the ITK bible.
If you are using CVS you'll be able to download the InsightDocuments dir 
too (lots of very usefull stuff there !).

Other than that there are a few applications:
http://itk.org/HTML/Applications.htm
Which shows -for urged people- what the toolkit can do.

ITK was build based on VTK experience, so you won't be in foreign lands.

HTH
mathieu

Marwan Adada wrote:
> Hello,
> 
> Yes Mathieu you are right I forgot to specify the number of iterations.
> It's working very well, the volume is smoothed.
> As for ITK, I am not using it.  What's special about it, and how can I 
> get to know more about using it??
> 
> Thank you all...
> 
> Mathiew thanks for forwarding the previous e-mail
> 
>> From: Mathieu Malaterre <Mathieu.Malaterre at creatis.insa-lyon.fr>
>> To: Marwan Adada <adada_marwan at hotmail.com>
>> CC: vtkusers at public.kitware.com
>> Subject: Re: [vtkusers] vtkMarchingCubes
>> Date: Thu, 24 Apr 2003 09:38:39 +0200
>>
>> Marwan
>>     I don't know what are you looking for. Anyway with 
>> vtkWindowSync... you forgot to specify the number of iterations.
>> Try something like:
>>
>> vtkWindowedSincPolyDataFilter smooth
>>     smooth SetInput [mcubes GetOutput]
>>     smooth SetNumberOfIterations 50
>>     smooth BoundarySmoothingOn
>>     smooth SetFeatureAngle 120
>>     smooth SetEdgeAngle 90
>>     smooth SetPassBand 0.1
>>
>> vtkPolyDataNormals normals
>>     normals SetInput [smooth GetOutput]
>>
>> vtkStripper stripper
>>     stripper SetInput [normals GetOutput]
>>
>> vtkPolyDataMapper cylMapper
>>     cylMapper SetInput [stripper GetOutput]
>>
>>
>> ---
>>     Also please note that these filters won't modify the number of 
>> edges so if your mesh is poorly define. Make use of any interpolation 
>> filters (butterfly etc...)
>>
>>
>> yaHTH
>>
>> mathieu
>>
>> Marwan Adada wrote:
>>
>>> Hello,
>>> I tried using these filters but for some reason I am not getting any 
>>> change in the output, my code is:
>>>
>>> vtkSmoothPolyDataFilter *Smooth = vtkSmoothPolyDataFilter::New();
>>>         Smooth->SetInput(mcubes->GetOutput());
>>>         Smooth->SetNumberOfIterations(10);
>>>         Smooth->SetRelaxationFactor(1);
>>>         Smooth->SetFeatureAngle(0);
>>>         Smooth->FeatureEdgeSmoothingOn();
>>>         Smooth->BoundarySmoothingOn();
>>>         Smooth->SetConvergence(0);
>>>         Smooth->ReleaseDataFlagOn();
>>>
>>> Then I tried :
>>> vtkWindowedSincPolyDataFilter 
>>> *Smooth=vtkWindowedSincPolyDataFilter::New();
>>>         Smooth->SetInput(mcubes->GetOutput());
>>>         Smooth->GenerateErrorVectorsOn();
>>>         Smooth->GenerateErrorScalarsOn();
>>>         Smooth->Update();
>>>
>>> And still no change, Any Ideas why this is happening??
>>> Thanks in Advance...
>>> Marc,
>>>
>>> P.S Thanks Mathieu
>>>
>>>
>>>> From: Mathieu Malaterre <Mathieu.Malaterre at creatis.insa-lyon.fr>
>>>> To: Marwan Adada <adada_marwan at hotmail.com>
>>>> CC: vtkusers at public.kitware.com
>>>> Subject: Re: [vtkusers] vtkMarchingCubes
>>>> Date: Wed, 23 Apr 2003 20:08:20 +0200
>>>>
>>>> http://www.vtk.org/doc/nightly/html/classvtkSmoothPolyDataFilter.html
>>>>
>>>> and
>>>> http://www.vtk.org/doc/nightly/html/classvtkWindowedSincPolyDataFilter.html 
>>>>
>>>>
>>>> the later is not lagrangian -> no shrinkage !
>>>>
>>>> HTH
>>>> mathieu
>>>>
>>>> Marwan Adada wrote:
>>>>
>>>>> Hello,
>>>>> Now I converted my 8bit buffer to a 16bit buffer and sliced it, 
>>>>> then passed it to vtkVolume16Reader and then to marching cubes, and 
>>>>> I got the volume.  But my result is not smooth at all, I set the 
>>>>> MarchingCube->ComputeNormalsOn(); and still the result is not smooth.
>>>>> Is there any filter I can use to smooth the resulting output from 
>>>>> marching cubes??
>>>>> Thanks in advance
>>>>>
>>>>> Marc
>>>>>
>>>>> P.S Thanks james;
>>>>>
>>>>>> From: James Dessart <james at rogue-research.com>
>>>>>> To: Marwan Adada <adada_marwan at hotmail.com>
>>>>>> CC: vtkusers at public.kitware.com
>>>>>> Subject: Re: [vtkusers] vtkMarchingCubes
>>>>>> Date: Wed, 23 Apr 2003 13:58:55 -0400 (EDT)
>>>>>>
>>>>>>
>>>>>>
>>>>>> On Wed, 23 Apr 2003, Marwan Adada wrote:
>>>>>>
>>>>>> > I have an 8 bit volume data (205x233x251) that I need to pass to
>>>>>> > vtkMarchingCubes.  I tried using vtkImageReader but it seems not 
>>>>>> to work
>>>>>> > with vtkMarchingCubes.  I tried vtkImageData and still couldn't 
>>>>>> pass it to
>>>>>> > vtkMarchingCubes.  I know vtkVolume16Reader works with 
>>>>>> vtkMarchingCubes, but
>>>>>> > my data 8bits not 16bits.  I am wondering what vtk 8bit Readers 
>>>>>> does
>>>>>> > vtkMarchingCubes accepts, Any Ideas??
>>>>>>
>>>>>> What you could try would be to read it in as 16-bit values, and run
>>>>>> marching cubes on that.  The values would be between 0-255, as 8-bit
>>>>>> values generally are, but that shouldn't matter, if you specify your
>>>>>> threshold for marching cubes properly.
>>>>>>
>>>>>> hope that helps,
>>>>>> James
>>>>>>
>>>>>
>>>>>
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>>>>
>>>>
>>>> -- 
>>>> Mathieu Malaterre
>>>> CREATIS
>>>> 28 Avenue du Doyen LEPINE
>>>> B.P. Lyon-Montchat
>>>> 69394 Lyon Cedex 03
>>>> http://www.creatis.insa-lyon.fr/~malaterre/
>>>>
>>>
>>>
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>>
>>
>> -- 
>> Mathieu Malaterre
>> CREATIS
>> 28 Avenue du Doyen LEPINE
>> B.P. Lyon-Montchat
>> 69394 Lyon Cedex 03
>> http://www.creatis.insa-lyon.fr/~malaterre/
>>
> 
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-- 
Mathieu Malaterre
CREATIS
28 Avenue du Doyen LEPINE
B.P. Lyon-Montchat
69394 Lyon Cedex 03
http://www.creatis.insa-lyon.fr/~malaterre/