Title :
Adaptive nonlocal filtering: a fast alternative to anisotropic diffusion for image enhancement
Author :
Fischl, Bruce ; Schwartz, Eric L.
Author_Institution :
NMR Center, Massachusetts Gen. Hosp., Charlestown, MA, USA
fDate :
1/1/1999 12:00:00 AM
Abstract :
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
Keywords :
adaptive filters; filtering theory; image enhancement; adaptive nonlocal filtering; adaptively determined vector field; image enhancement; image filtering; Adaptive filters; Anisotropic magnetoresistance; Computational efficiency; Filtering; Image enhancement; Kernel; Noise reduction; Nonlinear filters; Table lookup; Vectors;
Journal_Title :
Pattern Analysis and Machine Intelligence, IEEE Transactions on
