pixelcentres: Extract Pixel Centres as Point Pattern

In spatstat.geom: Geometrical Functionality of the 'spatstat' Family

Extract Pixel Centres as Point Pattern

Description

Given a pixel image or binary mask window, extract the centres of all pixels and return them as a point pattern.

Usage

pixelcentres(X, W = NULL, ...)

Arguments

X	Pixel image (object of class "im") or window (object of class "owin").
W	Optional window to contain the resulting point pattern.
...	Optional arguments defining the pixel resolution.

Details

If the argument X is a pixel image, the result is a point pattern, consisting of the centre of every pixel whose pixel value is not NA.

If X is a window which is a binary mask, the result is a point pattern consisting of the centre of every pixel inside the window (i.e. every pixel for which the mask value is TRUE).

Otherwise, X is first converted to a window, then converted to a mask using as.mask, then handled as above.

Value

A point pattern (object of class "ppp").

Author(s)

\adrian

, \rolf

and \ege

See Also

raster.xy

Examples

  pixelcentres(letterR, dimyx=5)

spatstat.geom documentation built on Sept. 18, 2024, 9:08 a.m.