A superior edge preserving filter with a systematic analysis
National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Program, 1991 - Technology & Engineering - 38 pages
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additive noise anchored template Ave.G background behavior break rule center pixel centrosymmetric channel data cluster comparison test component computed constant images contiguous K-average filter convex combination cutoff decrease define dimensional edge preserving filter eigenvalue eigenvector example expected value figure filter produce filtered image fixed point fixed template filter function grid guide the clean harmonic noise image noise image processing image standard deviation increasing Interface Length iteration K-average and contiguous linear filters maximum value mean std.dev median filter Mn(P multichannel multiplicative noise NASA noise cleaning noise removal nonlinear filters nonzero entries normal normally distributed number of neighbors number of pixels parameters pattern pixel wide pixel x,y precision arithmetic preserve edges reachability graph remote sensing removing noise Ronnie Pearson root structures scanner selected set selecting pixels set of pixels set of stable stable images statistics Stennis Space Center stripes subpopulation synthetic image theorem truncated window boundary width