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<DIV><SPAN class=081103619-09082006><FONT face=Arial color=#0000ff
size=2>Minjie,</FONT></SPAN></DIV>
<DIV><SPAN class=081103619-09082006><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=081103619-09082006><FONT face=Arial><FONT color=#0000ff
size=2>You can achieve this by using </FONT></FONT></SPAN></DIV>
<DIV><SPAN class=081103619-09082006><FONT face=Arial><FONT color=#0000ff
size=2></FONT></FONT></SPAN> </DIV>
<DIV><SPAN class=081103619-09082006><FONT face=Arial><FONT color=#0000ff
size=2> itk::LBFGSBOptimizer, </FONT></FONT></SPAN></DIV>
<DIV><SPAN class=081103619-09082006><FONT face=Arial><FONT color=#0000ff
size=2></FONT></FONT></SPAN> </DIV>
<DIV><SPAN class=081103619-09082006><FONT face=Arial><FONT color=#0000ff
size=2>which allows you to set bounds for the transformation parameters.
The code may look like</FONT></FONT></SPAN></DIV>
<DIV><SPAN class=081103619-09082006><FONT face=Arial><FONT color=#0000ff
size=2></FONT></FONT></SPAN> </DIV>
<DIV><SPAN class=081103619-09082006><FONT face=Arial color=#0000ff size=2>
typedef itk::LBFGSBOptimizer OptimizerType;</FONT></SPAN></DIV>
<DIV><SPAN class=081103619-09082006><FONT face=Arial color=#0000ff size=2>
OptimizerType::Pointer optimizer = optimizer::New();</FONT></SPAN></DIV>
<DIV><SPAN class=081103619-09082006><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=081103619-09082006><FONT face=Arial><FONT><FONT color=#0000ff
size=2> OptimizerType::BoundSelectionType boundSelect(
transform->GetNumberOfParameters() );<BR> OptimizerType::BoundValueType
upperBound( transform->GetNumberOfParameters() );<BR>
OptimizerType::BoundValueType lowerBound( transform->GetNumberOfParameters()
);<BR><BR> boundSelect.Fill( 2 ); // for each parameter, you can
choose to use lower bound, upper bound, or
both.</FONT></FONT></FONT></SPAN></DIV>
<DIV><SPAN class=081103619-09082006><FONT face=Arial><FONT><FONT color=#0000ff
size=2></FONT></FONT></FONT></SPAN> </DIV>
<DIV><SPAN class=081103619-09082006><FONT face=Arial><FONT><FONT color=#0000ff
size=2> // set values for upperBound and lowerBound
here<BR><BR> optimizer->SetBoundSelection( boundSelect );<BR>
optimizer->SetUpperBound( upperBound );<BR>
optimizer->SetLowerBound( lowerBound );<BR></FONT></FONT></FONT></SPAN></DIV>
<DIV><SPAN class=081103619-09082006><FONT face=Arial><FONT><FONT color=#0000ff
size=2>Hope this helps.</FONT></FONT></FONT></SPAN></DIV>
<DIV><SPAN class=081103619-09082006><FONT face=Arial><FONT><FONT color=#0000ff
size=2></FONT></FONT></FONT></SPAN> </DIV>
<DIV><SPAN class=081103619-09082006><FONT face=Arial><FONT><FONT color=#0000ff
size=2>Xiaodong</DIV>
<DIV></FONT></FONT></FONT></SPAN> </DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B>
insight-users-bounces+taox=research.ge.com@itk.org
[mailto:insight-users-bounces+taox=research.ge.com@itk.org]<B>On Behalf Of
</B>Minjie Wu<BR><B>Sent:</B> Wednesday, August 09, 2006 2:49 PM<BR><B>To:</B>
insight-users@itk.org<BR><B>Subject:</B> [Insight-users] BSpline Deformable
Registration<BR><BR></FONT></DIV><PRE>Hello All,<BR><BR>I am using BSpline Registration for 3D brain image alignment. The warped<BR>results look ok, but I am more interested in a constrained deformable<BR>registration, such as allow the deformation only in one direction (could
<BR><BR>be x, or y, or z-direciton).<BR><BR>I wonder if it is possible to have BSpline deformable registration with<BR>less deformation flexibility, such as allowing deformation in one<BR>direction only.<BR><BR>Or if there is any other deformable transformations in ITK have such
<BR><BR>constrained-deformation property?<BR><BR>Any suggestion is appreciate. Thank you very much for your help.<BR>-Minjie<BR></PRE></BLOCKQUOTE></BODY></HTML>