View source for ITK/Release 4/Refactor Numerical Libraries/Inventory/Non-Linear Optimization

= Optimizers =

== LBFGSB Optimizer ==

The LBFGSB optimizer is commonly used for optimization problems involving a high dimensional parametric space.

The LBFGSB optimizer provides the functionality of defining bounds for each one of the parameters in the optimization space.

=== Examples ===

The optimizer is commonly used to drive Deformable registration problems.

Specific examples can be found in

   ITK/Examples/Registration/


* DeformableRegistration4.cxx
* DeformableRegistration6.cxx
* DeformableRegistration7.cxx
* DeformableRegistration8.cxx
* DeformableRegistration12.cxx

They can be run by doing:

   ctest  -R   DeformableRegistration4   -V

=== The Code ===

==== In ITK ====

The ITK optimizer class can be found in

  ITK/Modules/Numerics/Optimizers

in the files

  ./src/itkLBFGSBOptimizer.cxx
  ./include/itkLBFGSBOptimizer.h

and a test is available at

 ./test/itkLBFGSBOptimizerTest.cxx


==== In VXL ====

The ITK class invokes the VXL class in

  ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/algo/vnl_lbfgsb.cxx
  ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/algo/vnl_lbfgsb.h


== Amoeba Optimizer ==

== Conjugate Gradient Optimizer ==