Random walks for vector field denoising

Random walks for vector field denoising
João Paixão, Marcos Lage, Fabiano Petronetto, Alex Bordignon, Sinésio Pesco, Geovan Tavares, Thomas Lewiner, Hélio Lopes

Abstract:

In recent years, several devices allow to directly measure real vector fields, leading to a better understanding of fundamental phenomena such as fluid simulation or brain water movement. This turns vector field visualization and analysis important tools for many applications in engineering and in medicine. However, real data is generally corrupted by noise, puzzling the understanding provided by those tools. Those tools thus need a denoising step as preprocessing, although usual denoising removes discontinuities, which are fundamental for vector field analysis. This paper proposes a novel method for vector field denoising based on random walks which preserve those discontinuities. It works in a meshless setting; it is fast, simple to implement, and shows a better performance than the traditional gaussian denoising technique.

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BibTeX:

@inproceedings{rwvectors_sibgrapi,
    author = {João Paixão and Marcos Lage and Fabiano Petronetto and Alex Bordignon and Sinésio Pesco and Geovan Tavares and Thomas Lewiner and Hélio Lopes},
    title = {Random walks for vector field denoising},
    year = {2009},
    month = {october},
    booktitle = {Sibgrapi 2009 (XXII Brazilian Symposium on Computer Graphics and Image Processing)},
    pages = {112--119},
    publisher = {IEEE},
    address = {Rio de Janeiro, RJ},
    doi = {10.1109/Sibgrapi.2009.13},
    url = {\url{http://thomas.lewiner.org/pdfs/rwvectors_sibgrapi.pdf}}
}