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THRESOTSU
Section: User Commands (1)
Updated: 16 Mar 1998
Index
NAME
thresOtsu - threshold by the method of Otsu
SYNTAX
thresOtsu [-l <lpv>] [-h <hpv>] <inimage> [<outimage>]
DESCRIPTION
thresOtsucalculates, and eventually applies, thethreshold value by using the method of Otsu. Themethod attempts to maximize the between-class variancebetween the class of pixels above the threshold, andthe class of pixels below.
If an output image is given, the input image isthresholded and written to the output image.Otherwise the threshold value is only reportedto standard output.
OPTIONS
- -l lpv
- Output for low pixels (below threshold). Default 0.
- -h hpv
- Output for high pixels (above threshold). Default 255.
REFERENCE
- Otsu, N.
- "A Threshold Selection Method from Gray-Level histograms"IEEE Trans. Syst., Man and Cyb.,Vol SMC-9, No.1, pp.62-66.
SEE ALSO
thresOtsu(3),
threshold(1),
thresPtile(1),
thresRidCal(1),
thresLloyd(1)
RESTRICTIONS
inimagemust have bands with pixel type unsigned byte.
AUTHOR
Tor Lønnestad, BLAB, Ifi, UiO
EXAMPLES
thresOtsu mona.img
thresOtsu -h 1 mona.img monaThres.img
ID
$Id: thresOtsu.c,v 1.20 1997/01/14 13:11:08 svein Exp $
Index
- NAME
- SYNTAX
- DESCRIPTION
- OPTIONS
- REFERENCE
- SEE ALSO
- RESTRICTIONS
- AUTHOR
- EXAMPLES
- ID
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