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BMVC
2010

Stratified Generalized Procrustes Analysis

13 years 1 months ago
Stratified Generalized Procrustes Analysis
This paper deals with generalized procrustes analysis. This is the problem of registering a set of shape data by finding a reference shape and global rigid transformations given point correspondences. The transformed shape data must align with the reference shape as best possible. This is a difficult problem. The classical approach computes alternatively the reference shape, usually as the average of the transformed shapes, and each transformation in turn. We propose a stratified approach inspired by recent results obtained in Structurefrom-Motion. Our stratified approach offers a statistically grounded framework for obtaining both the transformations and the reference shape at once in two steps. First, we compute a reference shape and affine transformations. Second, we upgrade these transformations to the sought after similarity or euclidean transformations. In practice each of these two steps involves solving a non-convex optimization problem. We provide convex approximations and cl...
Adrien Bartoli, Daniel Pizarro, Marco Loog
Added 10 Feb 2011
Updated 10 Feb 2011
Type Journal
Year 2010
Where BMVC
Authors Adrien Bartoli, Daniel Pizarro, Marco Loog
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