[Insight-users] NMI registration with 1+1 optimizer

[Martin Kavec]

Hello everybody,

I have used MultiResMIRegistration project from InsightApplications-1.8.0 as a 
base and tried to modify it to use normalized mutual information together 
with OnePlusOne optimizer. Also, I carefully looked at the 
ImageRegistration14.cxx from ITK Examples/Registration, since it uses the 
mentioned metric and optimizer.

The attached files are the only files I have modified and they compile fine on 
my system (gcc 3.3.4 20040623 (Gentoo Linux 3.3.4-r1, ssp-3.3.2-2, 
pie-8.7.6). However, the registration throws following exception on the 0 
level:

Caught an exception:

itk::ExceptionObject (0x8110dd8)
Location: "Unknown"
File: /opt/include/InsightToolkit/Algorithms/itkHistogramImageToImageMetric.txx
Line: 255
Description: itk::ERROR: 
NormalizedMutualInformationHistogramImageToImageMetric(0x8101410): All the 
points mapped to outside of the moving image

I am not sure, if I haven't done any fatal errors, while I edited the files. I 
searched for help ITKSoftwareGiude, ITK/VTK mailing lists and all the 
Registration/Examples. I am sending any detailes of the input volumes because 
I guess, the problem is still in the attached code.

I would very much appreciate any help. Thanks in advance.

Martin
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