| padimage {spatstat.geom} | R Documentation |
Pad the Border of a Pixel Image
Description
Fills the border of a pixel image with a given value or values, or extends a pixel image to fill a larger window.
Usage
padimage(X, value=NA, n=1, W=NULL)
Arguments
X |
Pixel image (object of class |
value |
Single value to be placed around the border of |
n |
Width of border, in pixels. See Details. |
W |
Window for the resulting image.
Incompatible with |
Details
The image X will be expanded by a margin of n
pixels, or extended to fill the window W,
with new pixel values set to value.
The argument value should be a single value (a vector of length
1), normally a value of the same type as the pixel values of X.
It may be NA. Alternatively if X is a
factor-valued image, value can be one of the levels of
X.
If n is given, it may be a single number, specifying the
width of the border in pixels. Alternatively it may be a vector
of length 2 or 4. It will be replicated to length 4, and these numbers
will be interpreted as the border widths for the
(left, right, top, bottom) margins respectively.
Alternatively if W is given, the image will be extended to
the window W.
Value
Another object of class "im", of the same type as X.
Author(s)
Adrian Baddeley Adrian.Baddeley@curtin.edu.au
Rolf Turner rolfturner@posteo.net
and Ege Rubak rubak@math.aau.dk
See Also
Examples
Z <- setcov(owin())
plot(padimage(Z, 1, 10))