Least-squares estimation of anisotropic similarity transformations from corresponding 2D point sets

Authors:
Carsten Steger
Affiliations:
MVTec Software GmbH, Neherstraíe 1, 81675 München, Germany
Venue:
Pattern Recognition Letters
Year:
2012

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Abstract

Pose estimation is a problem that occurs in many applications. In machine vision, the pose is often a 2D affine pose. In several applications, a restricted class of 2D affine poses with five degrees of freedom consisting of an anisotropic scaling, a rotation, and a translation must be determined from corresponding 2D points. A closed-form least-squares solution for this problem is described. The algorithm can be extended easily to robustly deal with outliers.