spatstat.geom (version 3.6-1)

distmap: Distance Map

Description

Compute the distance map of an object, and return it as a pixel image. Generic.

Usage

distmap(X, ...)

Value

A pixel image (object of class "im") whose grey scale values are the values of the distance map.

Details

The “distance map” of a set of points \(A\) is the function \(f\) whose value f(x) is defined for any two-dimensional location \(x\) as the shortest distance from \(x\) to \(A\).

This function computes the distance map of the set X and returns the distance map as a pixel image.

This is generic. Methods are provided for point patterns (distmap.ppp), line segment patterns (distmap.psp) and windows (distmap.owin) as well as other classes.

See Also

distmap.ppp, distmap.psp, distmap.owin, distfun

Examples

  U <- distmap(cells)
  V <- distmap(letterR)
  if(interactive()) {
  plot(U)
  plot(V)
  }