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THRESMINERR

Section: User Commands (1)
Updated: 16 Mar 1998
Index

NAME

thresMinErr - minimum error threshold.

SYNTAX

thresMinErr [<switches>] <inimage> [<outimage>]

DESCRIPTION

thresMinErrcalculates, and eventually applies,the threshold value needed to threshold theimage according to the minimum error thresholding metodsas described in Kittler & Illingworth and Gonzalez & Wintz.

-iter      - use iterative methode
              (thresMinErrIter)
-crit      - use criterion function method
              (thresMinErrCrit)
-eqVar     - use equal variances method
              (thresMinErrEqVar)

-mean - initial threshold is mean (default)
-t <tinit> - initial threshold 0<=tinit<=255
-ridcal - initial threshold = thresRidCal(h)

-l <lpv>   - output for low pixels (below thrs.).
              Default 0
-h <hpv>   - output for high pixels (above thrs.).
              Default 255

inimage - input image
outimage - output image

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.

REFERENCE

J. Kittler & J. Illingworth: "Minimum Error Thresholding"
Pattern Recognition, Vol 19, nr 1. 1986, pp. 41-47.
Gonzales, Rafael C & Wintz, Paul:
"Digital Image Processing"
Addison-Wesley, 1977.
Q.-Z. Ye & P.-E. Danielsson:
"On Minimum Error Thresholding and Its Implementations"
Pattern Recognition Letters 7,
1988, pp. 201-206.

RESTRICTIONS

Only UNS_BYTE pixels are supported

AUTHOR

Olav Borgli, BLAB, ifi, UiO

EXAMPLES

thresMinErr -iter -mean mona.img monaThres.img
thresMinErr -iter mona.img monaThres.img
thresMinErr -crit mona.img monaThres.img
thresMinErr -eqVar -t 112 mona.img

ID

$Id: thresMinErr.c,v 1.25 1997/03/17 13:45:07 svein Exp $

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