Obtain a discrete (pixel image) approximation of a given window
Usage
as.mask(w, eps=NULL, dimyx=NULL)
Arguments
w
A window (object of class "owin").
eps
Width and height of a pixel.
dimyx
Two integers giving the pixel array dimensions
Value
A window (object of class "owin")
of type "mask" representing a binary pixel image.
Details
The shape of the window w will be approximated
by a binary pixel image. See owin.object for
explanation of binary image masks.
The pixel raster will be an $m \times n$ rectangular grid
where $m, n$ are given by dimyx[2], dimyx[1]
respectively (if the argument dimyx is given)
or by the constraint that
pixel widths and heights should be approximately eps.
If neither eps nor dimyx is given,
the default is to set eps equal to 1/100 of the window
width or height.