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Fast parametric non-rigid image registration based on feature correspondences

  • US 7,596,283 B2
  • Filed: 04/05/2005
  • Issued: 09/29/2009
  • Est. Priority Date: 04/12/2004
  • Status: Expired due to Fees
First Claim
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1. In a computer, a method of non-rigid image registration between a fixed image and a moving image, comprising the steps of:

  • (a) detecting feature points on the fixed image and feature points on the moving image;

    (b) assigning a feature vector to each feature point;

    (c) calculating the dissimilarity of each pair of feature vectors for feature pairs on the fixed image and the moving image;

    (d) calculating the correspondence between feature pairs based on dissimilarity measure;

    Xi and Xi′

    ;

    (e) solving for a dense deformation field P using a closed form free from deformation (FFD) model; and

    (f) transforming the moving image and the feature points on the moving image using a current FFD deformation field estimate.

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