[Insight-users] Mattes MI: "Too many samples map outside..."

[Xabier Artaechevarria Artieda]

Hi all,
I am registering multiple images using Bspline transform. The program  
is working fine with all images except with one couple. I get the  
following error after 174 iterations:

170   -1.07817   4.07948e-05
171   -1.07818   4.09635e-05
172   -1.07818   5.61295e-05
173   -1.07818   4.65465e-05
174   -1.07818   4.64441e-05
ExceptionObject caught !

itk::ExceptionObject (0x6c81a0)
Location: "void  
itk::MattesMutualInformationImageToImageMetric<TFixedImage,  
TMovingImage>::GetValueAndDerivative(const typename  
itk::ImageToImageMetric<TFixedImage, TMovingImage>::ParametersType&,  
typename itk::ImageToImageMetric<TFixedImage,  
TMovingImage>::MeasureType&, typename  
itk::ImageToImageMetric<TFixedImage, TMovingImage>::DerivativeType&)  
const [with TFixedImage = main(int, char**)::FixedImageType,  
TMovingImage = main(int, char**)::MovingImageType]"
File:  
/usr/local/etc/ITK/Code/Algorithms/itkMattesMutualInformationImageToImageMetric.txx
Line: 995
Description: itk::ERROR:  
MattesMutualInformationImageToImageMetric(0x6ab920): Too many samples  
map outside moving image buffer: 0 / 184251

I have seen a previous thread where it was mentioned that this might  
be due to a lack of overlap between the images. However, at least  
visually, images seem to overlap quite well.
Is there any other possible reason? And ways to solve it?
Thanks in advance,
Xabi


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