threshold: Automatically determine value for image thresholding

In azvoleff/teamlucc: TEAM land use and cover change data processing toolkit

Description

The only method currently implemented is Huang's fuzzy thresholding method. The code for Huang's method was ported to C++ for teamlucc from the code in the Auto_Threshold imageJ plugin by Gabriel Landini. See original code at: http://www.mecourse.com/landinig/software/autothreshold/autothreshold.html

Usage

threshold(x, method = "huang", n_bin = 1000, maxpixels = 5e+05)

Arguments

x	the input image, as a matrix or raster
method	the thresholding method. Currently only "huang" is implemented.
n_bin	number of bins to use when calculating histogram
maxpixels	maximum number of pixels size to use when calculating histogram

Details

This function will run in parallel if a parallel backend is registered with foreach.

Value

integer threshold value

References

Huang, L.-K., and M.-J. J. Wang. 1995. Image thresholding by minimizing the measures of fuzziness. Pattern recognition 28 (1):41–51.

azvoleff/teamlucc documentation built on May 11, 2019, 5:19 p.m.