IEEE Trans Vis Comput Graph - Efficient Computation of Combinatorial Feature Flow Fields.

Tópicos

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Resumo

We propose a combinatorial algorithm to track critical points of 2D time-dependent scalar fields. Existing tracking algorithms such as Feature Flow Fields apply numerical schemes utilizing derivatives of the data, which makes them prone to noise and involve a large number of computational parameters. In contrast, our method is robust against noise since it does not require derivatives, interpolation, and numerical integration. Furthermore, we propose an importance measure that combines the spatial persistence of a critical point with its temporal evolution. This leads to a time-aware feature hierarchy, which allows us to discriminate important from spurious features. Our method requires only a single, easy-to-tune computational parameter and is naturally formulated in an out-of-core fashion, which enables the analysis of large data sets. We apply our method to synthetic data and data sets from computational fluid dynamics and compare it to the stabilized continuous Feature Flow Field tracking algorithm.

Resumo Limpo

propos combinatori algorithm track critic point d timedepend scalar field exist track algorithm featur flow field appli numer scheme util deriv data make prone nois involv larg number comput paramet contrast method robust nois sinc requir deriv interpol numer integr furthermor propos import measur combin spatial persist critic point tempor evolut lead timeawar featur hierarchi allow us discrimin import spurious featur method requir singl easytotun comput paramet natur formul outofcor fashion enabl analysi larg data set appli method synthet data data set comput fluid dynam compar stabil continu featur flow field track algorithm

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