[Insight-users] 3D image registration memory problem

[Karthik Krishnan]

No. On the contrary, for a 256x256x256 volume registration rigid 
registration with fairly good quality should usually take 5-20 minutes.

Did you plot a trace of the optimizer.

Have you tried the GUI application in InsightApplications ?  
LandmarkInitializedMutualInformation ? It does rigid registration with 
the Mattes metric.

HTH
-karthik

Smriti Raghunathan wrote:

> Hi,
> I have had the same problem using the MI metric in the past. Then I
> rewrote the 3D code to use Normalized Mutual Information metric with
> Versor3D transform and the versor 3D optimizer. Now the code just
> keeps running for days without converging...it ran only 45 iterations
> over a period of 72hrs without running any other application on that
> computer. Any suggestions, anyone? Is it really supposed to be this
> slow? How much RAM should my comp have so that this code runs at least
> a bit faster. Any help will be appreciated.
>
> Thanks
> Smriti
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