Fast parametric non-rigid image registration based on feature correspondences
US7596283B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 2005 |
| Grant date | Sep 29, 2009 |
| Priority date | — |
| Expiry date | Jun 3, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V10/757
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and system for non-rigidly registering a fixed to a moving image utilizing a B-Spline based free form deformation (FFD) model is disclosed. The methodology utilizes sparse feature correspondences to estimate an elastic deformation field in a closed form. In a multi-resolution manner, the method is able to recover small to large non-rigid deformations. The resulting deformation field is globally smooth and guarantees one-to-one mapping between the images being registered. The method generally comprises the steps of: detecting feature points on the fixed image and feature points on the moving image; assigning a feature vector to each feature point; calculating the dissimilarity of each pair of feature vectors for feature pairs on the fixed image and the moving image; calculating the correspondence between feature pairs based on the dissimilarity measure; solving for a dense deformation field P using a closed form FFD model; and transforming the moving image and the feature points on the moving image using a current FFD deformation field estimate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.