FLIRT: Fast and Flexible Iage Registration Toolbox

This is the webpage for the fast and flexible image registration toolbox - FLIRT - of MIC (formerly known as the SAFIR-research group). The toolbox contains a C/C++ library which is described in [1]. The implemented algorithms are introduced in [2,3].

To get the toolbox please write an e-mail to flirt at

We like to point out, that you have to read the Software-Disclaimer. Using the FLIRT-Toolbox involves accepting the restrictions and guarantees written down therein. The use of the FLIRT-toolbox is only for non-commercial purposes.

After receiving your e-mail you will get

  • the source code for 2D image registration (curvature, diffusive, elastic),
  • the source code for 3D elastic image registration,
  • the user guide.

Please feel free to ask for any kind of questions



  1. Nils Papenberg, Hanno Schumacher, Stefan Heldmann, Stefan Wirtz, Silke Bommersheim, Konstantin Ens, Jan Modersitzki, Bernd Fischer. A Fast and Flexible Image Registration Toolbox - Design and Implementation of the General Approach, Proc. of the BVM 2007, A. Horsch et al (eds.), Springer, Munich, 2007
    [ BibTeX ]
  2. Jan Modersitzki. Numerical Methods for Image Registration, Oxford University Press Series: Numerical Mathematics and Scientific Computation, 2004, ISBN: 0-19-852841-8.
    [ BibTeX ]

  3. Bernd Fischer, Jan Modersitzki. FLIRT: A Flexible Image Registration Toolbox, Biomedical Image Registration, 2nd Int. Workshop, WBIR 2003, J.C. Gee, J.B.A. Maintz, M.W. Vannier (eds.), Springer LNCS 2717, 2003, p 261--270.
    [ abstract | BibTeX | article ]