Description Usage Arguments Details Value Author(s) See Also Examples

Converts a line segment pattern to a pixel image by measuring the length or number of lines intersecting each pixel.

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`x` |
Line segment pattern (object of class |

`W` |
Optional window (object of class |

`...` |
Optional arguments passed to |

`weights` |
Optional vector of weights associated with each line segment. |

`what` |
String (partially matched) indicating whether to compute the
total length of intersection ( |

`DivideByPixelArea` |
Logical value, indicating whether the resulting pixel values should be divided by the pixel area. |

This function converts a line segment pattern to a pixel image by computing, for each pixel, the total length of intersection between the pixel and the line segments. Alternatively it can count the number of line segments intersecting each pixel.

This is a method for the generic function
`pixellate`

for the class of line segment patterns.

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.

If `weights`

are given, then the length of the intersection
between line segment `i`

and pixel `j`

is multiplied by
`weights[i]`

before the lengths are summed for each pixel.

A pixel image (object of class `"im"`

) with numeric values.

.

`pixellate`

,
`as.mask`

,
`as.mask.psp`

.

Use `as.mask.psp`

if you only want to know
which pixels are intersected by lines.

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spatstat documentation built on Nov. 21, 2017, 9:06 a.m.

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