calculateOtsu {CRImage} | R Documentation |
The function applies Otsu thresholding on the image.
calculateOtsu(allGreyValues)
allGreyValues |
Vector of grey values. |
The function calculates a value which separates the grey value histogram the best in foreground and background.
the threshold
Henrik Failmezger, failmezger@cip.ifi.lmu.de
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
calculateThreshold localOtsuThreshold
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))