[Insight-users] About mutual information and joint histogram

[Fricotin Bibi]

 Hello
 
 I started to work on the registration framework provided by itk.
 My question is:
 what is the optimal value that can be reached by the metric based on mutual information in itk.
 (like itkMattesMutualInformationImageToImageMetric for exemple)
 
 The ITK software guide suggest -1 in the figure results (on fig.8.39 p387) but I thought Mutual Information was infinity when  2 image are registered (It's Ok for the minus for the minimization)
 
 Is it because the images are normalized?
 
 
 Another question about Joint histogram
 
 I tried to compile the joint histogram plotter that can be found at Examples/Registration/ImageRegistrationHistogramPlotter.cxx
 and i got the following errors: 
 
 Linking CXX executable JHisto
 CMakeFiles/JHisto.dir/JHisto.o(.gnu.linkonce.t._ZN3itk10Statistics23DenseFrequencyContainer3NewEv+0x59): In function `itk::Statistics::DenseFrequencyContainer::New()':
 : undefined reference to `itk::Statistics::DenseFrequencyContainer::DenseFrequencyContainer[in-charge]()'
 CMakeFiles/JHisto.dir/JHisto.o(.gnu.linkonce.t._ZN3itk13ObjectFactoryINS_10Statistics23DenseFrequencyContainerEE6CreateEv+0xd): In function `itk::ObjectFactory<itk::Statistics::DenseFrequencyContainer>::Create()':
 : undefined reference to `typeinfo for itk::Statistics::DenseFrequencyContainer'
 CMakeFiles/JHisto.dir/JHisto.o(.gnu.linkonce.t._ZN3itk13ObjectFactoryINS_10Statistics23DenseFrequencyContainerEE6CreateEv+0x4e): In function `itk::ObjectFactory<itk::Statistics::DenseFrequencyContainer>::Create()':
 : undefined reference to `typeinfo for itk::Statistics::DenseFrequencyContainer'
 CMakeFiles/JHisto.dir/JHisto.o(.gnu.linkonce.t._ZN3itk10Statistics9HistogramIdLj2ENS0_23DenseFrequencyContainerEE10InitializeERKNS_4SizeILj2EEE+0x164): In function `itk::Statistics::Histogram<double, (unsigned)2, itk::Statistics::DenseFrequencyContainer>::Initialize(itk::Size<(unsigned)2> const&)':
 : undefined reference to `itk::Statistics::DenseFrequencyContainer::Initialize(unsigned long)'
 CMakeFiles/JHisto.dir/JHisto.o(.gnu.linkonce.t._ZNK3itk10Statistics9HistogramIdLj2ENS0_23DenseFrequencyContainerEE12GetFrequencyERKm+0x23): In function `itk::Statistics::Histogram<double, (unsigned)2, itk::Statistics::DenseFrequencyContainer>::GetFrequency(unsigned long const&) const':
 : undefined reference to `itk::Statistics::DenseFrequencyContainer::GetFrequency(unsigned long) const'
 CMakeFiles/JHisto.dir/JHisto.o(.gnu.linkonce.t._ZN3itk10Statistics9HistogramIdLj2ENS0_23DenseFrequencyContainerEE17IncreaseFrequencyERKmf+0x2a): In function `itk::Statistics::Histogram<double, (unsigned)2, itk::Statistics::DenseFrequencyContainer>::IncreaseFrequency(unsigned long const&, float)':
 : undefined reference to `itk::Statistics::DenseFrequencyContainer::IncreaseFrequency(unsigned long, float)'
 CMakeFiles/JHisto.dir/JHisto.o(.gnu.linkonce.t._ZN3itk10Statistics9HistogramIdLj2ENS0_23DenseFrequencyContainerEE9SetToZeroEv+0x18): In function `itk::Statistics::Histogram<double, (unsigned)2, itk::Statistics::DenseFrequencyContainer>::SetToZero()':
 : undefined reference to `itk::Statistics::DenseFrequencyContainer::SetToZero()'
 CMakeFiles/JHisto.dir/JHisto.o(.gnu.linkonce.t._ZN3itk10Statistics9HistogramIdLj2ENS0_23DenseFrequencyContainerEE12SetFrequencyERKmf+0x2a): In function `itk::Statistics::Histogram<double, (unsigned)2, itk::Statistics::DenseFrequencyContainer>::SetFrequency(unsigned long const&, float)':
 : undefined reference to `itk::Statistics::DenseFrequencyContainer::SetFrequency(unsigned long, float)'
 collect2: ld a retourné 1 code d'état d'exécution
 make[2]: *** [JHisto] Erreur 1
 make[1]: *** [CMakeFiles/JHisto.dir/all] Erreur 2
 make: *** [all] Erreur 2
 
 i use a gentoo-based linux distribution and the other examples works well
 gcc vesion is 3.3.5 and itk is 2.4.1
 
 Any idea??
 
 

		
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