bin_ot

Name

bin_ot, otsu_threshold - binarize a gray-scale band using Otsu`s method

Syntax

 #include <xite/binarize.h>

 int bin_ot( IBAND inband, IBAND outband );
 int otsu_threshold( IBAND inband, double* mu_0,
    double* mu_1, double* mu );

Description

The input band inband is binarized by bin_ot using the method of Otsu. The result is returned in outband.

otsu_threshold returns Otsu`s threshold for inband. The total mean mu and the two cluster means mu1 and mu2 are calculated.

Restrictions

inband and outband must have pixel type unsigned byte.

References

Nobuyuki Otsu: "A threshold selection method from gray-level histograms", IEEE transactions on Systems, man and cybernetics, vol T-SMC 9, no 1, pp 62-66, 1979.

Return value

 bin_ot         :  0 : OK
                   1 : Bad input pixel type
                   2 : Bad output pixel type
 otsu_threshold :  Otsu`s threshold

Files

src/binarize/bin_ot.c

Author

Řivind Due Trier

Id

$Id: bin_ot.c,v 1.17 1997/01/14 15:46:55 svein Exp $