I just tried your python script, with 2 identical spheres as ICP source and target. The result is as expected :<br><br>--------------------------------------------<br>Rotation around the X-axis: 0.0<br>Rotation around the Y-axis: -0.0<br>
Rotation around the Z-axis: 0.0<br><br>Translation along the X-axis: 0.0<br>Translation along the Y-axis: 0.0<br>Translation along the Z-axis: 0.0<br>-----------------------------------------------<br><br>If I move the 2nd sphere by setting its center to (0.1,0.2,0), I also got the expected result :<br>
------------------------------------------------<br>Rotation around the X-axis: -0.0<br>Rotation around the Y-axis: -0.0<br>Rotation around the Z-axis: 0.0<br><br>Translation along the X-axis: -0.1<br>Translation along the Y-axis: -0.2<br>
Translation along the Z-axis: 0.0<br>-------------------------------------------------<br><br>I am sorry to not being of more help.<br><br>Jerome<br><br><br><br><div class="gmail_quote">2011/6/30 Jérôme <span dir="ltr"><<a href="mailto:jerome.velut@gmail.com">jerome.velut@gmail.com</a>></span><br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">Hi,<br>Not for sure, but I think that there is a vtkTransform::Update( ) function, such as for the vtkAlgorithm.<br>
<br>HTH<br>Jerome<div><div></div><div class="h5"><br><br><div class="gmail_quote">2011/6/30 Christopher Denter <span dir="ltr"><<a href="mailto:dennda@the-space-station.com" target="_blank">dennda@the-space-station.com</a>></span><br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">*Bump*<br>
<br>
No ideas? Still trying to find a solution.<br>
<br>
<br>
On Jun 12, 2011, at 3:35 PM, Christopher Denter wrote:<br>
<br>
> Hello there,<br>
><br>
> I'm trying to help a friend fix a script and am a little confused as to the results of the ICP transform.<br>
> For testing purposes, I passed in the exact same dataset twice. I expected to receive something like an identity matrix back, but I get seemingly random (but reproducible) values back instead.<br>
> Here's the part of the script that uses the ICP transform and some of the output:<br>
> <a href="http://paste.pocoo.org/show/404964/" target="_blank">http://paste.pocoo.org/show/404964/</a><br>
><br>
> The ultimate goal would be to extract the best rotation / translation components from the matrix resulting from the ICP algorithm in order to know how to rotate/translate one object to best put it in place of the other.<br>
> I'm dealing with a bunch of vtkPolyData objects.<br>
><br>
> Any help is appreciated.<br>
><br>
><br>
> Thanks,<br>
> Christopher<br>
> _______________________________________________<br>
> Powered by <a href="http://www.kitware.com" target="_blank">www.kitware.com</a><br>
><br>
> Visit other Kitware open-source projects at <a href="http://www.kitware.com/opensource/opensource.html" target="_blank">http://www.kitware.com/opensource/opensource.html</a><br>
><br>
> Please keep messages on-topic and check the VTK FAQ at: <a href="http://www.vtk.org/Wiki/VTK_FAQ" target="_blank">http://www.vtk.org/Wiki/VTK_FAQ</a><br>
><br>
> Follow this link to subscribe/unsubscribe:<br>
> <a href="http://www.vtk.org/mailman/listinfo/vtkusers" target="_blank">http://www.vtk.org/mailman/listinfo/vtkusers</a><br>
<br>
_______________________________________________<br>
Powered by <a href="http://www.kitware.com" target="_blank">www.kitware.com</a><br>
<br>
Visit other Kitware open-source projects at <a href="http://www.kitware.com/opensource/opensource.html" target="_blank">http://www.kitware.com/opensource/opensource.html</a><br>
<br>
Please keep messages on-topic and check the VTK FAQ at: <a href="http://www.vtk.org/Wiki/VTK_FAQ" target="_blank">http://www.vtk.org/Wiki/VTK_FAQ</a><br>
<br>
Follow this link to subscribe/unsubscribe:<br>
<a href="http://www.vtk.org/mailman/listinfo/vtkusers" target="_blank">http://www.vtk.org/mailman/listinfo/vtkusers</a><br>
</blockquote></div><br>
</div></div></blockquote></div><br>