as.mask.psp | R Documentation |
Converts a line segment pattern to a binary pixel mask by determining which pixels intersect the lines.
as.mask.psp(x, W=NULL, ...)
x |
Line segment pattern (object of class |
W |
Optional window (object of class |
... |
Optional extra arguments passed to |
This function converts a line segment pattern to a binary pixel mask by determining which pixels intersect the lines.
The pixel raster is determined by W
and the optional arguments ...
.
If W
is missing or NULL
, it defaults to the window
containing x
.
Then W
is converted to a
binary pixel mask using as.mask
. The arguments
...
are passed to as.mask
to
control the pixel resolution.
A window (object of class "owin"
)
which is a binary pixel mask (type "mask"
).
and \rolf
pixellate.psp
,
as.mask
.
Use pixellate.psp
if you want to measure the
length of line in each pixel.
X <- psp(runif(10), runif(10), runif(10), runif(10), window=owin()) plot(as.mask.psp(X)) plot(X, add=TRUE, col="red")
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