<br>Hi Qing,<br><br>If you have a good guess of the values of the parameters<br>you should feed this information in the initialization of the<br>transform.<br><br>Please look at the ITK Software Guide<br><br> <a href="http://www.itk.org/ItkSoftwareGuide.pdf">
http://www.itk.org/ItkSoftwareGuide.pdf</a><br><br>for a description of the parameters for this transform.<br><br>There are only a couple of optimizers in ITK that will<br>consider constrains on the range of the parameters.
<br><br>You may want to look at:<br><a href="http://public.kitware.com/Insight/Doxygen/html/classitk_1_1LBFGSBOptimizer.html">http://public.kitware.com/Insight/Doxygen/html/classitk_1_1LBFGSBOptimizer.html</a><br><br><br>
Note that you could also use a Command/Observer to control the <br>optimizer and redirect it when it is getting out of a predefined range.<br>That will be specific code, different for every optimizer.<br><br><br> Regards,
<br><br><br> Luis<br><br><br>---------------------------------------------------------------------<br><div><span class="gmail_quote">On 6/22/07, <b class="gmail_sendername">qing xu</b> <<a href="mailto:qingxu8@hotmail.com">
qingxu8@hotmail.com</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Hi,<br><br>I am using VersorRigid3DTransformOptimizer. Could anyone tell me how to
<br>constrain the registration parameters? I have already known the approximate<br>range of the parameters, so I want to use this information to align two<br>volumes. Thanks in advance.<br><br>Qing<br><br>_________________________________________________________________
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