[Insight-users] VersorRigid3DTransform

Mon, 5 Jan 2004 07:19:23 -0800

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Hi Luis,
Thanks for your detailed responses on the optimizer for the
VersorRigid3DTransform. 

Could you let me know the timeframe when you anticipate this optimizer to be
available. Is there a way to check for it on my own for eg. on the
dashboard?

I also had a related question. In the software guide, you recommend that
when there are multiple transformations to take care of, it is sometimes
better
to take care of them one at a time using independent transforms in order to
reduce the dimension of the space of optimization. 
So in my case, if I wanted to take care of translation first, followed by
the rotation part
after that, my questions are:

1)       For the translation part would it be better to use the
RegularStepGradientDescentOptimizer?
2)       For the pure rotation part, would it better to use the
VersorTransformOptimizer?
3)       After I finish the translation part, I am assuming that I will need
to do a resampling stage so I can create an intermediate
      image, which I then use as my moving image for the rotation part. Is
this correct? If so, I would totally need two resamplings. Would I not lose
some detail in
        my final image because of that. Is there a better way to do this, so
I can compose the two transformations, so I only do one resampling?

Thanks
Radhika

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<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Hi Luis,<o:p></o:p></span></font></p>

Thanks for your detailed responses on the optimizer =
for the
VersorRigid3DTransform. <o:p></o:p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

Could you let me know the timeframe when you =
anticipate this
optimizer to be available. Is there a way to =
check for
it on my own for eg. on the
dashboard?<o:p></o:p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

I also had a related question. In the software =
guide, you
recommend that when there are multiple transformations to take care of, =
it is
sometimes better<o:p></o:p>

to<fon=
t size=3D2
face=3DArial> take =
care of them
one at a time using independent transforms in order to reduce the =
dimension of
the space of optimization. <o:p></o:p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>So in my case, if I wanted to take care of =
translation
first, followed by the rotation part<o:p></o:p></span></font></p>

<p class=3DMsoNormal><span class=3DGramE><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>after</span></font></span><=
font
size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'> that, my
questions are:<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal =
style=3D'margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 lfo1;
tab-stops:list .5in'><![if !supportLists]><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial;mso-fareast-font-family:Aria=
l'><span
style=3D'mso-list:Ignore'>1)<font size=3D1 face=3D"Times New =
Roman"><span
style=3D'font:7.0pt "Times New =
Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></font></span></span></font><![endif]><font
size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'>For the
translation part would it be better to use the <span =
class=3DSpellE>RegularStepGradientDescentOptimizer</span>?<o:p></o:p></s=
pan></font></p>

<p class=3DMsoNormal =
style=3D'margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 lfo1;
tab-stops:list .5in'><![if !supportLists]><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial;mso-fareast-font-family:Aria=
l'><span
style=3D'mso-list:Ignore'>2)<font size=3D1 face=3D"Times New =
Roman"><span
style=3D'font:7.0pt "Times New =
Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></font></span></span></font><![endif]><font
size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'>For the pure
rotation part, would it better to use the <span =
class=3DSpellE>VersorTransformOptimizer</span>?<o:p></o:p></span></font>=
</p>

<p class=3DMsoNormal =
style=3D'margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 lfo1;
tab-stops:list .5in'><![if !supportLists]><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial;mso-fareast-font-family:Aria=
l'><span
style=3D'mso-list:Ignore'>3)<font size=3D1 face=3D"Times New =
Roman"><span
style=3D'font:7.0pt "Times New =
Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></font></span></span></font><![endif]><font
size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'>After I
finish the translation part, I am assuming that I will need to do a =
<span
class=3DSpellE>resampling</span> stage so I can create an =
intermediate<o:p></o:p></span></font></p>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; image, which I then use as my moving image for the =
rotation
part. Is this correct? If so, I would totally need two resamplings.
Would I not lose some detail in<o:p></o:p>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
my final image because of that. Is there a better =
way to do
this, so I can compose the two transformations, so I only do one resampling?<o:p></o:p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Thanks<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'>Radhika<o:p></o:p></span></font></p>

<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;
font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>

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