RankFltImg
DESCRIPTION
Performs a 2D rank filter on an image.
A 3 x 3 neighborhood of points is sorted by value in ascending order
and the target point is replaced by the pixel of a specified Rank.
For example, for a 3 x 3 neighborhood, Rank can specify min (0), max
(8) or median (4). RankFltImg subsumes the operation of the modules
MedianFltImg, MinFltImg, and MaxFltImg. Rank filtering is similar to
the median filter, discussed in:
Digital Image Processing, Gonzales, R.C., Wintz, P.,
Addison Wesley, Second Edition, 1987, pp 162--163.
INPUTS
Port: Img In
Type: Lattice
Constraints: 1..3-D.
source image
WIDGETS
Port: Rank
Type: Slider
rank by which to filter
OUTPUTS
Port: Img Out
Type: Lattice
Constraints: 1..3-D.
filtered image
PROBLEMS
SEE ALSO
MedianFltImg
MinFltImg
MaxFltImg
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© The Numerical Algorithms Group Ltd,
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