MAN page from RedHat Other XITE-3.3-3.i386.rpm

LAPLACE

Section: C Library Functions (3)
Updated: 16 Mar 1998
Index

NAME

laplace - edge and line detection

SYNTAX

#include <xite/convolve.h>

void laplace( IBAND input, IBAND output, int a,
int b, int c, double scale, double offset,
int verbose );

DESCRIPTION

laplaceperforms the convolution betweena band inputand a convolution kernel conv.

        a          b          a
        b          c          b
        a          b          a

The result of the convolution is scaled
pix = (conv. result) * scale + offset;

If scaleis zero an autoscaling is performed.If verboseflag is set, the number of underflows andoverflows are printed. If verboseflag is setand autoscale is performed the scale and offsetfactors are displayed

conv3x3_overflowand conv3x3_underflowareglobal variabels and may be declared as
extern int conv3x3_overflow, conv3x3_underflow

AUTHOR

Otto Milvang

EXAMPLES

ID

$Id: laplace.c,v 1.25 1996/11/08 14:03:05 svein Exp $

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