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Adaptive nonlocal filtering: a fast alternative to anisotropic diffusion for image enhancement

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2 Author(s)
Fischl, B. ; NMR Center, Massachusetts Gen. Hosp., Charlestown, MA, USA ; Schwartz, E.L.

Nonlinear anisotropic diffusion algorithms provide significant improvement in image enhancement as compared to linear filters. However, the excessive computational cost of solving nonlinear PDEs precludes their use in real-time vision applications. We show that two orders of magnitude speed improvement is provided by a new image filtering paradigm in which an adaptively determined vector field specifies nonlocal application points for an image filter

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Pattern Analysis and Machine Intelligence, IEEE Transactions on  (Volume:21 ,  Issue: 1 )