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[[File:Image-based flow visualization.png|thumb|Image-based flow visualization where a grid image is advected by the flow field.]]
In [[scientific visualization]], '''image-based flow visualization''' is a technique proposed by [[Jarke van Wijk]] <ref>{{cite journal|last=van Wijk|first=Jack|authorlink=Jack van Wijk|title=Image Based Flow Visualization|journal=Proceedings ACM SIGGRAPH 2002, San Antonio, Texas|year=2002|url=http://www.win.tue.nl/~vanwijk/ibfv/ibfv.pdf}}</ref> to visualize flows, like the wind movement of a [[tornado]]. Compared with classical Integration like techniques it has the advantage of producing a whole image at every step. It is a method from the [[texture advection]] family.▼
▲In [[scientific visualization]], '''image-based flow visualization''' (or '''visualisation''') is a computer modelling technique
== Principle ==▼
The core idea is to create a noise texture on a regular grid and then bend this grid according to the flow (the vector field). The bended grid is then sampled at the original grid locations. Thus, the output is a version of the noise, that is displaced according to the flow.▼
▲The core idea is to create a noise texture on a regular grid and then bend this grid according to the flow (the vector field). The
[[File:Image-Based Flow Visualization.svg|Warping of the grid and resampling at original locations]]
The advantage of this approach is that it can be accelerated on modern graphics hardware, thus allowing for [[real-time simulation|real-time]] or almost real-time simulation of 2D flow data. This is particularly handy if one wants to visualise multiple scaled versions of the vector field to first gain an overview and then concentrate on the details.<ref>{{cite book |series=Proceedings of the SPIE |volume=6060 |pages=606001 |year=2006 |url=http://www.mpi-inf.mpg.de/~strzodka/papers/public/TeSt06MIBFV.pdf |bibcode=2006SPIE.6060E..01T |last1=Telea |first1=Alexandru |last2=Strzodka |first2=Robert |title=Visualization and Data Analysis 2006 |chapter=Multiscale image based flow visualization |editor-first1=Robert F. |editor-first2=Jonathan C. |editor-first3=Matti T. |editor-first4=Katy |editor-last1=Erbacher |editor-last2=Roberts |editor-last3=Gröhn |editor-last4=Börner |doi=10.1117/12.640425 |citeseerx=10.1.1.72.3457 |s2cid=14935756 }}{{Dead link|date=September 2024 |bot=InternetArchiveBot |fix-attempted=yes }}</ref>
==
{{reflist}}
* [http://www.win.tue.nl/~vanwijk/ibfv/ Website of Jarke van Wijk with demo software and pictures]▼
==External links==
▲* [http://www.win.tue.nl/~vanwijk/ibfv/ Website of Jarke van Wijk with demo software and pictures]
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[[Category:Fluid dynamics]]
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