[ITK] registration - memory concerns

[Luigi Riba]

Dear Matt,

thank you very much for the quick and informative reply.

I'll try your suggestion of changing the transformation parameters from
double to float.

Best,

Luigi

2015-11-09 17:23 GMT+01:00 Matt McCormick <matt.mccormick at kitware.com>:

> Hi Luigi,
>
> The type of optimizer should not have too large of an impact on memory
> consumption.  Using a gradient-free optimizer may help slightly, but
> try changing the pixel type of the input images or, if possible, the
> parameter type of the transformation, from double to float.
>
> HTH,
> Matt
>
> On Mon, Nov 9, 2015 at 10:24 AM, Luigi Riba <ribaluigi at gmail.com> wrote:
> > Dear all,
> >
> > I am registering a couple of volumes with ITK 4 on windows 7 64 bit.
> >
> > I wrote a code based on the affine transformation, with the mean square
> > error metric and the RegularStepGradientDescentOptimizerv4.
> Unfortunately,
> > the memory usage is pretty high.
> >
> > I have checked memory consumption with the itkMemoryProbe and, after
> looking
> > around on previous mailing list messages I have decided to try with a
> > gradient free optimizer like the Nelder-Mead one.
> >
> > So I have rewrote the code using the AmoebaOptimizerV4 and I have
> continued
> > monitoring the memory consumption via MemoryProbe. Unfortunately, it
> seems
> > that nothing has changed. Is this working as expected? If this is the
> case,
> > do you have any suggestion to gave me in order to reduce the memory
> > consumption of the code?
> >
> > Thanks in advance for the help.
> >
> > Best,
> >
> > Luigi
> >
> > _______________________________________________
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> > Community at itk.org
> > http://public.kitware.com/mailman/listinfo/community
> >
>
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