IEEE Trans Vis Comput Graph - Stable Feature Flow Fields.

Tópicos

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{ featur(3375) classif(2383) classifi(1994) }
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Resumo

Feature Flow Fields are a well-accepted approach for extracting and tracking features. In particular, they are often used to track critical points in time-dependent vector fields and to extract and track vortex core lines. The general idea is to extract the feature or its temporal evolution using a stream line integration in a derived vector field -- the so-called Feature Flow Field (FFF). Hence, the desired feature line is a stream line of the FFF. As we will carefully analyze in this paper, the stream lines around this feature line may diverge from it. This creates an unstable situation: if the integration moves slightly off the feature line due to numerical errors, then it will be captured by the diverging neighborhood and carried away from the real feature line. The goal of this paper is to define a new FFF with the guarantee that the neighborhood of a feature line has always converging behavior. This way, we have an automatic correction of numerical errors: if the integration moves slightly off the feature line, it automatically moves back to it during the ongoing integration. This yields results which are an order of magnitude more accurate than the results from previous schemes.

Resumo Limpo

featur flow field wellaccept approach extract track featur particular often use track critic point timedepend vector field extract track vortex core line general idea extract featur tempor evolut use stream line integr deriv vector field socal featur flow field fff henc desir featur line stream line fff will care analyz paper stream line around featur line may diverg creat unstabl situat integr move slight featur line due numer error will captur diverg neighborhood carri away real featur line goal paper defin new fff guarante neighborhood featur line alway converg behavior way automat correct numer error integr move slight featur line automat move back ongo integr yield result order magnitud accur result previous scheme

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