Though interestingly, it isn't a closed form solution as advertised. Horn used an iterative method for finding the eigenvalues, and so does VTK. The complete closed-form solution was developed later.<div><br></div><div>
- David</div><div><br><br><div class="gmail_quote">On Tue, Dec 6, 2011 at 1:37 PM, Antonio <span dir="ltr"><<a href="mailto:antoniod987@gmail.com">antoniod987@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Il 06/12/2011 18:50, Tim Hutton ha scritto:<div class="im"><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
/*<br>
79 The solution is based on<br>
80 Berthold K. P. Horn (1987),<br>
81 "Closed-form solution of absolute orientation using unit quaternions,"<br>
82 Journal of the Optical Society of America A, 4:629-642<br>
83 */<br>
<a href="http://vtk.org/gitweb?p=VTK.git;a=blob;f=Hybrid/vtkLandmarkTransform.cxx;h=f0d982509089701f13eee5523865ba0985ba5e8e;hb=HEAD" target="_blank">http://vtk.org/gitweb?p=VTK.<u></u>git;a=blob;f=Hybrid/<u></u>vtkLandmarkTransform.cxx;h=<u></u>f0d982509089701f13eee5523865ba<u></u>0985ba5e8e;hb=HEAD</a><br>
<br>
<br>
On 6 December 2011 16:55, andon<<a href="mailto:antoniod987@gmail.com" target="_blank">antoniod987@gmail.com</a>> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi dears,<br>
does someone know what the algoritm on wich vtkLandmarkTransform is based<br>
on, from a theoric point of view?<br>
Antonio<br></blockquote></blockquote></div></blockquote></div><br></div>