imager: label – R documentation

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label

Label connected components.

Description

The algorithm of connected components computation has been primarily done by A. Meijster, according to the publication: 'W.H. Hesselink, A. Meijster, C. Bron, "Concurrent Determination of Connected Components.", In: Science of Computer Programming 41 (2001), pp. 173–194'.

Usage

label(im, high_connectivity = FALSE, tolerance = 0)

Arguments

`im`	an image
`high_connectivity`	4(false)- or 8(true)-connectivity in 2d case, and between 6(false)- or 26(true)-connectivity in 3d case. Default FALSE
`tolerance`	Tolerance used to determine if two neighboring pixels belong to the same region.

Examples

imname <- system.file('extdata/parrots.png',package='imager')
im <- load.image(imname) %>% grayscale
#Thresholding yields different discrete regions of high intensity
regions <- isoblur(im,10) %>% threshold("97%") 
labels <- label(regions)
layout(t(1:2))
plot(regions,"Regions")
plot(labels,"Labels")

imager

Image Processing Library Based on 'CImg'

v0.42.10

LGPL-3

Authors

Simon Barthelme [aut], David Tschumperle [ctb], Jan Wijffels [ctb], Haz Edine Assemlal [ctb], Shota Ochi [cre]

Initial release