dilate.owin

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Dilate a Window

Perform morphological dilation of a window

Keywords
spatial, math
Usage
dilate.owin(w, r, ...)
Arguments
w
A window (object of class "owin".
r
positive number: the radius of dilation.
...
extra arguments to as.mask controlling the pixel resolution
Details

The morphological dilation of a set $W$ by a distance $r > 0$ is the set consisting of all points lying at most $r$ units away from $W$. Effectively, dilation adds a margin of width $r$ onto the set $W$.

This function computes the dilation of the window w. If w is not a rectangle, it must be approximated by a binary pixel image, and the arguments "..." are passed to as.mask to determine the pixel resolution. There is a sensible default.

Value

• Another object of class "owin" representing the dilated window.

owin, as.owin
w <- owin(c(0,1),c(0,1))
v <- dilate.owin(w, 0.1)