On the shape-from-moments problem and recovering edges from noisy Radon data
- Goldenshluger, Alexander
- Spokoiny, Vladimir
2010 Mathematics Subject Classification
- 62C20 62G20 94A12
- minimax estimation, optimal rates of convergence, shape, moments, support function, Radon transform, tomography
We consider the problem of reconstructing a planar convex set from noisy observations of its moments. An estimation method based on pointwise recovering of the support function of the set is developed. We study intrinsic accuracy limitations in the shape-from-moments estimation problem by establishing a lower bound on the rate of convergence of the mean squared error. It is shown that the proposed estimator is near-optimal in the sense of the order. An application to tomographic reconstruction is discussed, and it is indicated how the proposed estimation method can be used for recovering edges from noisy Radon data.
- Probab. Theory Related Fields, vol 128 (2004), no 1, pp. 123-140