compute.features {SAFARI}

Shape Features

Description

Compute the shape descriptors of the given region, represented by its binary matrix and the polygonal chain of its boundary.

Usage

compute.features(
  region,
  plg.chain,
  categories = c("geometric", "boundary", "topological")
)

Arguments

region

a binary matrix that represents the region.

plg.chain

an n-by-2 numeric matrix that represents the boundary.

categories

a character string or vector, specifying which features to compute.

Details

The shape descriptors are divided into three categories: geometric, boundary, and topological. The default will compute the features from all categories. We also note that, for the binary matrix, the ones and zeros make up the region of interest and background, respectively.

Value

A numeric vector composed of the shape descriptors.

See Also

See Polygonal Chain for more information on the closed polygonal chain.