calculateOtsu: Does Otsu thresholding

Description Usage Arguments Details Value Author(s) References See Also Examples

View source: R/calculateOtsu.R

Description

The function applies Otsu thresholding on the image.

Usage

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calculateOtsu(allGreyValues)

Arguments

allGreyValues

Vector of grey values.

Details

The function calculates a value which separates the grey value histogram the best in foreground and background.

Value

the threshold

Author(s)

Henrik Failmezger, failmezger@cip.ifi.lmu.de

References

Nobuyuki Otsu: A threshold selection method from grey level histograms. In: IEEE Transactions on Systems, Man, and Cybernetics. New York 9.1979, S.62-66. ISSN 1083-4419

See Also

calculateThreshold localOtsuThreshold

Examples

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f1= system.file("extdata", "exImg2.jpg", package="CRImage")
print(f1)
img=readImage(f1)
print(img)
#convert to grayscale
imgG=EBImage::channel(img,'grey')
#threshold value
t=calculateOtsu(as.vector(imgG))

CRImage documentation built on Nov. 8, 2020, 8:01 p.m.