Dilate a Window

Description

Perform morphological dilation of a window

Usage

 dilate.owin(w, r, ...)

Arguments

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.

Author(s)

Adrian Baddeley adrian@maths.uwa.edu.au http://www.maths.uwa.edu.au/~adrian/ and Rolf Turner rolf@math.unb.ca http://www.math.unb.ca/~rolf

See Also

owin, as.owin

Examples

  w <- owin(c(0,1),c(0,1))
  v <- dilate.owin(w, 0.1) 
  # returns rectangle [-0.1, 1.1] x [-0.1, 1.1]