Bayesian estimation of turbulent motion

Based on physical laws describing the multiscale structure of turbulent flows, this paper proposes a regularizer for fluid motion estimation from an image sequence. Regularization is achieved by imposing some scale invariance property between histograms of motion increments computed at different sca...

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Detalles Bibliográficos
Autores principales: Heás, P., Herzet, C., Meḿin, E., Heitz, D., Mininni, P.D.
Formato: JOUR
Materias:
Bayesian model selection
Constrained optimization
Optic flow
Robust estimation
Turbulence
Bayesian perspective
Fluid flow estimation
Fluid motion estimation
Multi-scale structures
Scale-invariance property
Bayesian networks
Computer vision
Estimation
Flow of fluids
Models
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_01628828_v35_n6_p1343_Heas
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:Based on physical laws describing the multiscale structure of turbulent flows, this paper proposes a regularizer for fluid motion estimation from an image sequence. Regularization is achieved by imposing some scale invariance property between histograms of motion increments computed at different scales. By reformulating this problem from a Bayesian perspective, an algorithm is proposed to jointly estimate motion, regularization hyperparameters, and to select the most likely physical prior among a set of models. Hyperparameter and model inference are conducted by posterior maximization, obtained by marginalizing out non-Gaussian motion variables. The Bayesian estimator is assessed on several image sequences depicting synthetic and real turbulent fluid flows. Results obtained with the proposed approach exceed the state-of-the-art results in fluid flow estimation. © 2013 IEEE.

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