dilation.owin(w, r, ..., polygonal=TRUE, tight=TRUE)
dilate.owin(w, r, ..., polygonal=TRUE, tight=TRUE)
"owin"
.as.mask
controlling the pixel resolution, if the pixel approximation is
used.polygonal=TRUE
) or
a pixel grid approximation (polygonal=FALSE
).tight=TRUE
), or should be the
dilation of the bounding frame of w
(tight=F
"owin"
representing the
dilated window. The functions dilate.owin
and dilation.owin
are
identical, and compute the dilation of the window w
.
If polygonal=TRUE
and w
is a rectangle or a polygonal
window, then a polygonal approximation to the dilation is computed.
Otherwise, the window w
is first approximated by a binary pixel image,
and the arguments "..."
are passed to as.mask
to determine the pixel resolution. There is a sensible default.
erode.owin
for the opposite operation.
owin
,
as.owin
w <- owin(c(0,1),c(0,1))
v <- dilate.owin(w, 0.1)
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