Random change on a Lie group and mean glaucomatous projective shape change detection from stereo pair images

  • Authors:
  • M. Crane;V. Patrangenaru

  • Affiliations:
  • -;-

  • Venue:
  • Journal of Multivariate Analysis
  • Year:
  • 2011

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Abstract

In this article we develop a nonparametric methodology for estimating the mean change for matched samples on a Lie group. We then notice that for k=5, a manifold of projective shapes of k-ads in 3D has the structure of a 3k-15 dimensional Lie group that is equivariantly embedded in a Euclidean space, therefore testing for mean change amounts to a one sample test for extrinsic means on this Lie group. The Lie group technique leads to a large sample and a nonparametric bootstrap test for one population extrinsic mean on a projective shape space, as recently developed by Patrangenaru, Liu and Sughatadasa. On the other hand, in the absence of occlusions, the 3D projective shape of a spatial k-ad can be recovered from a stereo pair of images, thus allowing one to test for mean glaucomatous 3D projective shape change detection from standard stereo pair eye images.