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Hi Sercani,<br>thanks a lot for your kind answer,<br>I was able to solve my problem by converting my image in a vtkUnsignedCharArray<br><br> scalars = vtk.vtkUnsignedCharArray()<br> scalars.DeepCopy(image.GetPointData().GetScalars())<br><br>and then by using scalars.GetValue(i)<br><br>Yours sincerely,<br>Mary<br><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: rgb(31, 73, 125);"></span><br><br><hr id="stopSpelling">From: sercanimailgroups@gmail.com<br>To: edsb@hotmail.it; vtkusers@vtk.org<br>Subject: RE: [vtkusers] help please!!!!!get coordinates<br>Date: Thu, 12 Feb 2009 02:18:49 +0200<br><br>
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<p class="EC_MsoNormal"><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: rgb(31, 73, 125);">Here is a sample that gets mouse position on a volume (or
another imagedata prop) and gets the world and structured coordinates…</span></p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: rgb(31, 73, 125);"> </span></p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: rgb(31, 73, 125);"> vtkPointPicker picker = new vtkPointPicker();</span></p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: rgb(31, 73, 125);"> picker.Pick(mouseX,mouseY, 0, renderer);</span></p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: rgb(31, 73, 125);"> double[] pos = new double[3];</span></p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: rgb(31, 73, 125);"> pos = picker.GetMapperPosition();</span></p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: rgb(31, 73, 125);"> int volIndex = imageData.FindPoint(pos); //voxel Id</span></p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: rgb(31, 73, 125);"> double[] worldPos = new double[3];</span></p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: rgb(31, 73, 125);"> worldPos = imageData.GetPoint(volIndex); //world
coordinates of the voxel</span></p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: rgb(31, 73, 125);"> int ijk[] = new int[3];</span></p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: rgb(31, 73, 125);"> double pcoords[] = new double[3];</span></p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: rgb(31, 73, 125);"> imageData.ComputeStructuredCoordinates(pos, ijk,
pcoords); //ijk is structured coordinates of the voxel</span></p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: rgb(31, 73, 125);"> </span></p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: rgb(31, 73, 125);">Yours sincerely,</span></p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: rgb(31, 73, 125);">Sercani…..</span></p>
<p class="EC_MsoNormal"><span style="font-size: 11pt; font-family: 'Calibri','sans-serif'; color: rgb(31, 73, 125);"> </span></p>
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<p class="EC_MsoNormal"><b><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';">From:</span></b><span style="font-size: 10pt; font-family: 'Tahoma','sans-serif';"> vtkusers-bounces@vtk.org
[mailto:vtkusers-bounces@vtk.org] <b>On Behalf Of </b>EDSB EDSB<br>
<b>Sent:</b> Wednesday, February 11, 2009 4:24 PM<br>
<b>To:</b> vtk mailing list<br>
<b>Subject:</b> [vtkusers] help please!!!!!get coordinates</span></p>
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<pre>Hello all,<br><br>I apologize for annoying you again with my question but I need some help.<br><br>How can I extract the 3D coordinates of some non-zero voxel in a binary metaimage?<br><br><span style="color: black;">I 'm sorry for my insistence, </span>but I couldn't find any example on this topic.<br><br>Thanks a lot for your help!<br><br><br><br>Mary</pre>
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