createNeighbourhoodInfo {tractor.base}

Image neighbourhoods

Description

This function calculates information about a cuboidal region of an image, with a centre and a fixed voxel width.

Usage

createNeighbourhoodInfo(width, dim = 3, centre = rep(0, dim))

Arguments

width

An integer voxel width. Must be odd.

dim

An integer giving the dimensionality of the neighbourhood. Currently must be 3.

centre

A numeric vector giving the centre voxel of the neighbourhood. Must have exactly dim elements.

Value

createNeighbourhoodInfo returns a list with class "neighbourhoodInfo" and elements

width

Copied from the width argument.

dim

Copied from the dim argument.

centre

Copied from the centre argument.

vectors

dim x width^dim matrix whose columns give the locations of each point in the neighbourhood.

innerProducts

A square, symmetric matrix of inner products between every location in the neighbourhood and every other.

Author(s)

Jon Clayden

References

Please cite the following reference when using TractoR in your work:

J.D. Clayden, S. Muñoz Maniega, A.J. Storkey, M.D. King, M.E. Bastin & C.A. Clark (2011). TractoR: Magnetic resonance imaging and tractography with R. Journal of Statistical Software 44(8):1-18. doi:10.18637/jss.v044.i08.