Coupling reduced models for optimal motion estimation

Abstract : The paper discusses the issue of motion estimation by image assimilation in numerical models, based on Navier-Stokes equations. In such context, models' reduction is an attractive approach that is used to decrease cost in memory and computation time. A reduced model is obtained from a Galerkin projection on a subspace, defined by its orthogonal basis. Long temporal image sequences may then be processed by a sliding-window method. On the first sub-window, a fixed basis is considered to define the reduced model. On the next ones, a Principal Order Decomposition is applied, in order to define a basis that is simultaneously small-size and adapted to the studied image data. Results are given on synthetic data and quantified according to state-of-the-art methods. Application to satellite images demonstrates the potential of the approach.
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  • HAL Id : hal-00803622, version 1

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Karim Drifi, Isabelle Herlin. Coupling reduced models for optimal motion estimation. ICPR - 21st International Conference on Pattern Recognition, Nov 2012, Tsukuba, Japan. pp.2651-2654. ⟨hal-00803622⟩

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