Dear Luca,
I very much agree with your point, it's a great!
Thank you for the answer.
Best regards
YiQiang
--- 12年3月18日，周日, Luca Antiga <luca.ant...@orobix.com> 写道：
发件人: Luca Antiga <luca.ant...@orobix.com>
主题: Re: [vmtk-users] convert into c++
收件人: "Lia Silva" <liamak...@portugalmail.pt>
抄送: vmtk-users@lists.sourceforge.net
日期: 2012年3月18日,周日,下午7:56
Hi Lia,
that's not quite what I intended. I'll you a few more explicit suggestions:
1) all the algorithms in vmtk are already in C++. The fact that you're using
them
in vmtk scripts is just for convenience. Note that this does not impose *any*
overhead,
speed-wise.
2) make sure you understand why you need to have a C++-only code. Is
it for speed only? See point 1). Is if because you want to incorporate vmtk in
a purely C++ program? This would make more sense.
3) every algorithm in vmtk is a VTK class. If you know how to program in
C++ using VTK,
you know how to program in C++ using vmtk. So, make sure you are proficient
writing
VTK code before you move on with vmtk. There's a great resource of examples
here:
http://www.vtk.org/Wiki/VTK/Examples/Cxx
4) Once you have addressed 1-3, have a look into vmtk/vmtkScripts and identify
the scripts
you're interested in and take a look at what classes are used. For instance,
the code for
vmtksurfacetriangle is
cleaner = vtk.vtkCleanPolyData()
cleaner.SetInput(self.Surface)
cleaner.Update()
triangleFilter = vtk.vtkTriangleFilter()
triangleFilter.SetInput(cleaner.GetOutput())
triangleFilter.Update()
self.Surface = triangleFilter.GetOutput()
which in C++ would become
vtkCleanPolyData* cleaner = vtkCleanPolyData::New();
cleaner->SetInput(surface);
cleaner->Update();
vtkTriangleFilter* triangleFilter = vtkTriangleFilter::New();
triangleFilter->SetInput(cleaner->GetOutput());
triangleFilter->Update();
surface = triangleFilter->GetOutput();
As you see, the high-level code is almost exactly the same, and in both
cases, the call to Update triggers code that is already written in C++.
Hope this helps clarifying, but most of all, what you should clarify is point
2, i.e. what
is the need you're trying to address when you say you want pure C++ code.
Best regards
Luca
On Mar 17, 2012, at 6:41 PM, Lia Silva wrote:
Em 17-03-2012 07:40, Luca Antiga escreveu:
Dear Lia,
vmtk code presents itself as Python code, but it is in fact a tiny wrapper
on top of C++ code. All algorithms are already implemented in C++ (see
vmtk/vtkVmtk directory). If you look for code optimizations, you should look
into the C++ code in that directory.
Best regards
Luca
--
Luca Antiga, PhD
Cofounder and Principal Scientist, Orobix Srl
via L.A. Muratori 3, 24123 Bergamo, Italy
orobix: www.orobix.com
home: lantiga.github.com
twitter: twitter.com/lantiga
On Mar 17, 2012, at 12:50 AM, Lia Silva wrote:
Hello all!
How can i convert a vmtk code into c++ code, so i can run it faster? The
code in vmtk it's attached.
Thank you in advance
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03/16/12So, it means that i have to implement all in c++ since the beginning?
For example, i used the vmtkimagereader, so in c++ i've to use
Dicomseriereadprinttagswrite? And for the vmtkimagevoiselector i have to use
the RegionofInterestImageFilter? Is that it? I'm so confused... Isn't there
another way easier and faster? I thought i could convert directly into c++..
Thank you for all your pacience
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