Extension to Infinite Dimensions of a Stochastic Second-Order Model associated with the Shape Splines

Details Extension to Infinite Dimensions of a Stochastic Second-Order Model associated with the Shape Splines Extension to Infinite Dimensions of a Stochastic Second-Order Model associated with the Shape Splines

2010-03-20

arxiv.org/abs/1003.3957v1

Mathematics

Probability

34 pages, 11 figures

Scientific paper

We introduce a second-order stochastic model to explore the variability in growth of biological shapes with applications to medical imaging. Our model is a perturbation with a random force of the Hamiltonian formulation of the geodesics. Starting with the finite-dimensional case of landmarks, we prove that the random solutions do not blow up in finite time. We then prove the consistency of the model by demonstrating a strong convergence result from the finite-dimensional approximations to the infinite-dimensional setting of shapes. To this end we introduce a suitable Hilbert space close to a Besov space that leads to our result being valid in any dimension of the ambient space and for a wide range of shapes.

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