[ITK] [ITK-users] differences in the output of OptimizerType::ParameterType on different linux version

[Matt McCormick]

Hi shrikant,

Numerical stability has improved in ITKv4.  The latest version may be
worth a try.

Thanks,
Matt

On Fri, Jun 5, 2015 at 3:51 PM, shrikant <shrikantvc at gmail.com> wrote:
> Hi,
>
> I have two versions of Linux as below.
> 1) suse (Linux yyy 2.6.27.56-0.1-default #1 SMP 2010-12-01 16:57:58 +0100
> x86_64 x86_64 x86_64 GNU/Linux)
> 2) debian  (Linux xxx 2.6.32-504.8.1.el6.x86_64 #1 SMP Tue Jan 27 13:39:10
> CST 2015 x86_64 x86_64 x86_64 GNU/Linux)
>
> I have an executable which statically built on Debian. It does non-regid
> registration and prints the transformation parameters using
> GetLastTransformParameters function call. I see ~10% differences in the
> output when I run it on two different OS listed above.
>
> When I do ldd to the executable it shows dynamic dependency for libm.so.6.
> when i use libm.so.6 from Debian to the suse it produces the same result.
>
> for me this would be ok if the differences are in floating point and very
> small But when I print the values i.e. output of the
> GetLastRansforParameters() for index 521 from SUSE is "-74.33100" and from
> Debian is "-81.30033" which is like 10% off and this is true for almost all
> the values in the transform parameters.
>
> i dont understand what is going wrong and which one is correct from suse or
> from debian. anyhelp would be appreciated.
>
> Note: I am using ITK 3.20.1 and calling regitration->StartRgistration().
> Although i know that Start Registation is deprecated function call and
> recomendation to use Update function. Also using Update function I am
> getting the same output.
>
>
>
> --
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