An adaptive algorithm for the cornea modeling from keratometric data
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AutorMartínez-Finkelshtein, Andrei; Ramos López, Darío; Castro-Luna, Gracia M.; Alio y Sanz, Jorge L.
In this paper we describe an adaptive and multi-scale algorithm for the parsimonious t of the corneal surface data that allows to adapt the number of functions used in the reconstruction to the conditions of each cornea. The method implements also a dynamical selection of the parameters and the management of noise. It can be used for the real-time reconstruction of both altimetric data and corneal power maps from the data collected by keratoscopes, such as the Placido rings based topographers, decisive for an early detection of corneal diseases such as keratoconus. Numerical experiments show that the algorithm exhibits a steady exponential error decay, independently of the level of aberration of the cornea. The complexity of each anisotropic gaussian basis functions in the functional representation is the same, but their parameters vary to fit the current scale. This scale is determined only by the residual errors and not by the number of the iteration. Finally, the position and clust...
Polinomios de Zernike
Superficie de reconstrucción
Modelado de superficies
Irregularidades de la córnea
Funciones de base radial
Radial basis functions