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List:       insight-users
Subject:    Re: [ITK-users] Registration: Fix transform parameter?
From:       Matt McCormick <matt.mccormick () kitware ! com>
Date:       2015-02-23 18:24:39
Message-ID: CALzTN-SiDGzOmbsHQdoKvFgcCM7B38kPhEvcyUnO3C93CJ502g () mail ! gmail ! com
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Hi Tobias,

Welcome to ITK!

Yes, SetWeights can be used to fix a parameter.  See the class
documentation here [1].

HTH,
Matt

[1] http://www.itk.org/Doxygen/html/classitk_1_1ObjectToObjectOptimizerBaseTemplate.html


On Mon, Feb 23, 2015 at 1:00 PM, Nöbauer,Tobias
<tobias.noebauer@imp.ac.at> wrote:
> Hi all,
> 
> is there a simple/generic way to exclude a transform parameter from getting \
> optimized during a registration process, i.e. just hold it at its initial value? I \
> would for example like to allow for rotations around x, but not y, in a \
> VersorRigid3DTransform, because I know the latter can't happen. Would it make sense \
> to set the corresponding optimizer scale value to an extremely high value? -- This \
> would not really disable this DOF, but just make larg values unlikely, correct? 
> I'm using the current alpha version of SimpleITK 0.9 (Python wrapped), so it would \
> be even greater if a solution existed within SimpleITK... 
> Thanks a lot (also, for the great software),
> Tobias
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