# dilate.owin

From spatstat v1.9-0
by Adrian Baddeley

##### Dilate a Window

Perform morphological dilation of a window

- Keywords
- spatial

##### Usage

`dilate.owin(w, r, ...)`

##### Arguments

- w
- A window (object of class
`"owin"`

. - r
- positive number: the radius of dilation.
- ...
- extra arguments to
`as.mask`

controlling the pixel resolution

##### Details

The morphological dilation of a set $W$ by a distance $r > 0$ is the set consisting of all points lying at most $r$ units away from $W$. Effectively, dilation adds a margin of width $r$ onto the set $W$.

This function computes the dilation of the window `w`

.
If `w`

is not
a rectangle, it must be approximated by a binary pixel image,
and the arguments `"..."`

are passed to `as.mask`

to determine the pixel resolution. There is a sensible default.

##### Value

- Another object of class
`"owin"`

representing the dilated window.

##### See Also

##### Examples

```
w <- owin(c(0,1),c(0,1))
v <- dilate.owin(w, 0.1)
# returns rectangle [-0.1, 1.1] x [-0.1, 1.1]
```

*Documentation reproduced from package spatstat, version 1.9-0, License: GPL version 2 or newer*

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