[Insight-users] Difference between 3.4 and 3.14 for MattesMutualInformation Registration ?

[Uma Ranjan]

Dear all,

 I see a difference in the transform values (and visual performance) between
ITK 3.4 and 3.14 versions for the same images and identical parameters.


 I use VersorRigid3DTransform  with LinearInterpolateImageFunction as
interpolator,  MattesMutualInformationImageToImageMetric as metric and
VersorRigid3DTransformOptimizer as optimizer.

The performance seemed to be better in 3.4. Is there anything additional
that I need to specify between the two versions ?

I have set the following parameters for the optimizer :
   SetScales(optimizerScales), setMaximumStepLength(.),
setMinimumStepLength(.),SetNumberOfIterations(.), setRelaxationFactor(.),
MinimizeOn() ;

For the Metric, I set the following :

 SetNumberOfHistogramBins(), SetNumberOfSpatialSamples(.),
ReiniitalizeSeed(.),

Best regards

Uma Ranjan
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