img2ps {LOMAR}

img2ps

Description

Read an image into a point set. The points are formed by extracting the coordinates of voxel values strictly above the given cut-off (default 0).

Usage

img2ps(img = NULL, bkg = 0, crop.size = NULL)

Arguments

img

either a 2d or 3d array or a path to a file containing a 2d or 3d image.

bkg

Extract points for values strictly above this (default = 0).

crop.size

vector (of length 2 or 3) containing the desired reduced size of the images along each dimension, e.g. c(30,30,30).

Value

a point set as matrix with columns x,y[,z]

Examples

img.file <- system.file("test_data/img", "alien1_3d.tif", package = "LOMAR",
 mustWork = TRUE) 
point_set <- img2ps(img = img.file, bkg = 0)