A Fast B-Spline Pseudo-inversion Algorithm for Consistent Image Registration
Recently, the concept of consistent image registration has been introduced to refer to a set of algorithms that estimate both the direct and inverse deformation together, that is, they exchange the roles of the target and the scene images alternatively; it has been demonstrated that this technique improves the registration accuracy, and that the biological significance of the obtained deformations is also improved.
When dealing with free form deformations, the inversion of the transformations obtained becomes computationally intensive. In this paper, we suggest the parametrization of such deformations by means of a cubic B-spline, and its approximated inversion using a highly efficient algorithm. The results show that the consistency constraint notably improves the registration accuracy, especially in cases of a heavy initial misregistration, with very little computational overload.
KeywordsFree form image registration consistent registration B-splines inverse transformation
Unable to display preview. Download preview PDF.
- 7.Cachier, P., Rey, D.: Symmetrization of the non-rigid registration problem using inversion-invariant energies: application to multiple sclerosis. In: Delp, S.L., DiGoia, A.M., Jaramaz, B. (eds.) MICCAI 2000. LNCS, vol. 1935, pp. 472–481. Springer, Heidelberg (2000)Google Scholar
- 13.Viola, P., Wells III, W.M.: Alignment by maximization of mutual information. In: Proc. of Fifth International Conference on Computer Vision, pp. 16–23 (1995)Google Scholar