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<DIV><FONT face=Verdana color=#0000ff size=2>
<DIV><FONT face=Verdana color=#0000ff size=2>Dear Mr Luis Ibanez:</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Verdana color=#0000ff size=2>You really helped me a lot!
And I have learned much about Optimizer and Transform under your suggestion and
guidance.</FONT></DIV></FONT></DIV>
<DIV><FONT face=Verdana color=#0000ff size=2>Thank you very much
indeed!</FONT></DIV>
<DIV><FONT face=Verdana color=#0000ff size=2></FONT><FONT face=Verdana
size=2></FONT> </DIV>
<DIV><FONT face=Verdana size=2> </DIV></FONT>
<DIV align=left>
<DIV><FONT color=#c0c0c0><FONT face=Verdana size=2>jimmy</FONT></DIV>
<DIV><FONT face=Verdana size=2>2007-07-24</FONT></FONT></DIV></DIV>
<DIV><FONT face=Verdana size=2>
<HR>
</FONT></DIV>
<DIV><FONT face=Verdana><FONT size=2> Luis Ibanez</FONT></FONT></DIV>
<DIV><FONT face=Verdana><FONT
size=2> 2007-07-23 21:20:38</FONT></FONT></DIV>
<DIV><FONT face=Verdana><FONT size=2> jimmy</FONT></FONT></DIV>
<DIV><FONT face=Verdana><FONT size=2> insight-users; Julien
Jomier</FONT></FONT></DIV>
<DIV><FONT face=Verdana><FONT size=2> Re: Re: [Insight-users] Problem about
the ITKAPP-IntensityBased2D3DRegistration : API Changes in
CenteredEuler3DTra</FONT></FONT></DIV>
<DIV><FONT face=Verdana size=2></FONT> </DIV>
<DIV><FONT face=Verdana size=2><BR>Hi Jimmy,<BR><BR>Thanks for letting us know
about your version of Insight and InsightApplications.<BR><BR>This seems to be a
real bug:<BR><BR>The API of itkCenteredEuler3DTransforms changed around March
2005, and this<BR>program was not updated correctly to match the new
API.<BR><BR><A
href="http://www.itk.org/cgi-bin/viewcvs.cgi/Code/Common/itkCenteredEuler3DTransform.h?root=Insight&r1=1.4&r2=1.5">http://www.itk.org/cgi-bin/viewcvs.cgi/Code/Common/itkCenteredEuler3DTransform.h?root=Insight&r1=1.4&r2=1.5
</A><BR><BR>The most recent API of the itkCenteredEuler3DTransform used 9
parameters:<BR><BR> 3 for rotation<BR> 3 for
translation<BR> 3 for the center of rotation<BR><BR>The program
however, still expects only 6 parameters: <BR><BR> 3 for
rotation<BR> 3 for translation<BR><BR><BR>We have just reported this as
Bug#5382:<BR><A
href="http://public.kitware.com/Bug/bug.php?op=show&bugid=5382">http://public.kitware.com/Bug/bug.php?op=show&bugid=5382
</A><BR><BR><BR>The simplest solution is for you to replace
the<BR><BR> CenteredEuler3DTransform<BR><BR>with
the<BR><BR> Euler3DTransform <BR><BR>We are now making similar
changes in the CVS version of InsightApplications.
<BR><BR><BR>----<BR><BR><BR> Regarding the meaning of the Optimizer scales
please read the <BR> ITK Software Guide<BR><BR> <A
href="http://www.itk.org/ItkSoftwareGuide.pdf">http://www.itk.org/ItkSoftwareGuide.pdf</A>
<BR><BR><BR> in particular the "Image Registration"
chapter.<BR><BR> The purpose of the scaling array that is passed to
the optimizer <BR> is to make more uniform the dynamic range of the
Transform <BR> parameters. E.g. radians in rotations versus
millimeters in <BR> Translation.<BR><BR> The size of the
parameter scaling array *MUST* be the same <BR> of the number of
Transform parameters, since each element <BR> of the parameter
scaling array correspond to one of the <BR> Transform
parameters.<BR> <BR><BR> This is explained in the
ITK Software Guide, and has been <BR> discussed many times in the
list. Please read the guide and<BR> let us know if you still have
any questions. <BR><BR><BR>
Thanks<BR><BR><BR>
Luis<BR><BR><BR><BR><BR>==============================================<BR>
<DIV><SPAN class=gmail_quote>On 7/23/07, <B class=gmail_sendername>jimmy</B>
<<A href="mailto:jimmy_lab@163.com"> jimmy_lab@163.com</A>> wrote:</SPAN>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0pt 0pt 0pt 0.8ex; BORDER-LEFT: rgb(204,204,204) 1px solid">Thank
you for your reply.<BR><BR>The version of Insight and InsightApplication are
both 2.8.1.<BR>The source file of IntensityBased2D3DRegistration is also
attached.<BR><BR>Line 994 is where the problem located.<BR>Could you tell me
that what the meaning of weightings here used by
Optimizer?<BR>optimizer->SetScales(weightings); // <- what do
the scales stand for? <BR><BR>I have also downloaded the newest version of
IntensityBased2D3DRegistration, it seems to be unchanged.<BR>The file version
is "Version: $Revision: 1.4 $ ".<BR><BR>Thanks in
advance.<BR><BR><BR>------------------
<BR>jimmy<BR>2007-07-23<BR><BR>-------------------------------------------------------------<BR>发件人：Luis
Ibanez<BR>发送日期：2007-07-22 23:01:25<BR>收件人：jimmy<BR>抄送：insight-users<BR>主题：Re:
[Insight-users] Problem about
the ITKAPP-IntensityBased2D3DRegistration
<BR><BR><BR>Hi Jimmy,<BR><BR> What version of
Insight
are you using ?<BR> What version of InsightApplications are you
using ?<BR><BR>Over time the API of some of the ITK transforms has
changed.<BR>Notably, the Center of rotation, used to be part of the
<BR>parameters of the transform. This may explain the mismatch<BR>between 6
and 9 parameters.<BR><BR>It is likely that you are combining two imcompatible
versions<BR>of Insight and InsightApplications.<BR><BR><BR>Please let us know,
<BR><BR><BR>
Thanks<BR><BR><BR> Luis<BR><BR><BR>--------------<BR>jimmy
wrote:<BR>> Hi, everyone:<BR>><BR>> When I running the ITKAPP
[IntensityBased2D3DRegistration],<BR>> an error occurs as the following:
<BR>><BR>> itk::ExceptionObject (00F7FCD0)<BR>> Location: "void
__thiscall itk::RegularStepGradientDescentBaseOptimizer::Advance<BR>>
OneStep(void)"<BR>> File:
ITKSource\Code\Numerics\itkRegularStepGradientDescentBaseOptimizer.cxx
<BR>> Line: 200<BR>> Description: itk::ERROR:
RegularStepGradientDescentOptimizer(015128A8): The size<BR>> of
Scales is 6, but the NumberOfParameters for the CostFunction is
9.<BR>><BR>> Can someone tell my why? ( The test example is
from BrainWeb ) <BR>><BR>> 1.<BR>> Is it the problem of<BR>>
itk::Optimizer::ScalesType weightings( 6 ); ?<BR>><BR>> What
does it use for? How to expand it into *9?*<BR>><BR>>
2.<BR>> And when I ignore the option of the command line
<BR>> ./IntensityBased2D3DRegistration [-t -100 -100 -100]
projection.mhd /data/BrainWeb/brainweb165a10f17.mha<BR>><BR>> The
iteration of optimizer is 0, and the parameters of transform do not
change.<BR>> furthermore the programe crashed when writing the wrong result
image. <BR>><BR>> Don't you think it is more reasonable that we should
not input any tranformation information before
registration?<BR>><BR>><BR>><BR>> --------------<BR>>
jimmy<BR>> 2007-07-18<BR>> <BR>><BR>>
------------------------------------------------------------------------<BR>><BR>>
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