[Insight-users] How to make registration faster

[Luis Ibanez]

Hi Cspl,

The parameters of the Multi-Resolution framework were
described in detail by Lydia Ng in the SoftwareGuide.pdf
document:

    http://www.itk.org/ItkSourceGuide.pdf

Section 7.6, pdf-pages 194 to 205.

You will also find descriptions of the parameters in the
demo application:

    Insight/src/MultiResMIRegistration

in the "Readme.pdf" file.

Please let us know if you have questions that are not
answered by these documents.

One of the first changes you may want to consider is
to use MattesMutualInformation instead of the Viola-Wells
implementation. Mattes version produces a much smoother
function and allows to use the RegularStepGradientDescent
optimizer that can converge more rapidly.


Thanks


   Luis


---------------------------------

cspl wrote:
> Dear Mr.Luis,
>  I could understand and get registration.
>  My datasets are of sixe 256X256X120.Registration process is talking 
> almost 25 min.
> I know that registration is slow process.But,I think 25 mins is too large.
> In multiresolution framework,by using pyramids we can decrease 
> time.But,What are all the parameters I have to use to decrease time as 
> much as possible.
> I am very much required of the registration output and time factor is 
> very important for me.I want to optimize both.
>  
> Thanks in advance,
> Valli.