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Proceedings/Recueil Des Communications Année : 2024

Maximum likelihood estimation of subgrid flows from tracer image sequences

Résumé

From a sequence of tracer satellite images, several methods (e.g. optical flow) exist to successfully estimate the main advecting current. Yet, this estimate is limited in resolution. To go beyond, we propose a new parametric estimation method to estimate second-order statistics of the residual small-scale velocity. We first express stochastic transport in a discrete setting to apply standard MLE techniques. Then we propose an efficient method to solve the MLE optimization problem through a fast log-likelihood gradient evaluation algorithm.
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Dates et versions

hal-04549000 , version 1 (16-04-2024)

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  • HAL Id : hal-04549000 , version 1

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Valentin Resseguier. Maximum likelihood estimation of subgrid flows from tracer image sequences. STUOD 2023, 2024. ⟨hal-04549000⟩
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