retistruct (version 0.5.11)

Outline: Outline constructor

Description

Construct an outline object. This sanitises the input points P, as described below.

Usage

Outline(P, scale = NA, im = NULL)

Arguments

P

The points of the outline. The last point is not repeated.

scale

The length of one unit of P in micrometres. When images are present, this is the length of the side of a pixel in the image.

im

An image as a raster object

Value

An Outline object containing the following:

P

A N-by-2 matrix of points of the Outline arranged in anticlockwise order

gf

For each row of P, the index of P that is next in the outline travelling anticlockwise (forwards)

gb

For each row of P, the index of P that is next in the outline travelling clockwise (backwards)

im

The image as a raster object

scale

The length of one unit of P in micrometres