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<p class="MsoNormal">If the surface is inside the volume then you can use vtkProbeFilter to set surface color to the voxel’s color at the same position. 3D Slicer provides this in the “Probe volume with model” module – you can try it there or have a look at
its source code for an example:<o:p></o:p></p>
<p class="MsoNormal"><a href="https://github.com/Slicer/Slicer/blob/master/Modules/CLI/ProbeVolumeWithModel/ProbeVolumeWithModel.cxx">https://github.com/Slicer/Slicer/blob/master/Modules/CLI/ProbeVolumeWithModel/ProbeVolumeWithModel.cxx</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Andras<o:p></o:p></p>
<p class="MsoNormal"><a name="_MailEndCompose"><o:p> </o:p></a></p>
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<p class="MsoNormal"><b>From:</b> vtkusers [mailto:vtkusers-bounces@vtk.org] <b>On Behalf Of
</b>Kurt Sansom<br>
<b>Sent:</b> Monday, June 5, 2017 7:34 PM<br>
<b>To:</b> vtk <vtkusers@vtk.org><br>
<b>Subject:</b> [vtkusers] Project voxel/pixel value onto surface mesh<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hi,<o:p></o:p></p>
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<p class="MsoNormal"> I am trying to come up with an efficient way to project voxel values from an image volume to a surface mesh.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Basically I have a triangle surface mesh with normal information, and I want to create a new cell array that is the voxel intensity value closest to the surface mesh in the normal direction.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">I am thinking it's kind of like doing an iso-surface but I want image intensities from the image volume based on the location of the surface mesh and then I want to be able to view the image as projected on the surface mesh.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Another way I was thinking of this is texturing the surface with the image intensities based on the closest voxel/pixel to the surface.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Another way I thinking of doing it is using two image volumes vol_1 is the image stack and vol_2 is a signed distance field where I want the pixel intensity of vol_1 at the zero level set of vol_2.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Does anyone have an example or can think a good way to do this?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Regards,<o:p></o:p></p>
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<p class="MsoNormal"> ~Kurt<o:p></o:p></p>
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<p class="MsoNormal">-- <o:p></o:p></p>
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<p class="MsoNormal">Kurt Sansom<o:p></o:p></p>
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