NONLIN2D

Purpose:

Performs nonlinear 2D filtering with a kernel of size KSIZE on a square image matrix.

NONLIN2D(image, type, ksize)

image

An image or table

wintype

An integer. The image filter type:

ksize

Optional. An integer. Kernel size, must be odd. Defaults to 3.

A table.

W1: readb("baboon.dat", UBYTE)

W2: ravel(W1, 128); setmatrix(1); setplottype(3)

W3: nonlin2d(W2, 0, 3); setmatrix(1); setplottype(3)

filters the baboon image with a 3x3 median filter kernel.

NONLIN2D processes an image with a colormap.

See MAXFILT, MEDFILT, and MINFILT to perform maximum, median and minimum filtering on images with a colormap and 24 bit RGB images.