Current File : //usr/man/man3mlib/mlib_ImageErode4.3mlib

'\" te
.\" Copyright (c) 2007, Sun Microsystems, Inc.  All Rights Reserved 
.TH mlib_ImageErode4 3MLIB "2 Mar 2007" "SunOS 5.11" "mediaLib Library Functions"
.SH NAME
mlib_ImageErode4 \- four neighbor erode
.SH SYNOPSIS
.LP
.nf
cc [ \fIflag\fR... ] \fIfile\fR... \fB-lmlib\fR [ \fIlibrary\fR... ]
#include <mlib.h>

\fBmlib_status\fR \fBmlib_ImageErode4\fR(\fBmlib_image *\fR\fIdst\fR, \fBconst mlib_image *\fR\fIsrc\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The \fBmlib_ImageErode4()\fR function performs an erode operation on an image by using each pixel's four orthogonal neighbors. The source and destination images must be single-channel images. The data type can be \fBMLIB_BIT\fR, \fBMLIB_SHORT\fR, \fBMLIB_USHORT\fR, or \fBMLIB_INT\fR.
.sp
.LP
For 4-neighbor binary images, it uses the following equation:
.sp
.in +2
.nf
dst[x][y][0] = AND{ src[x][y][0],
                    src[x-1][y][0], src[x+1][y][0],
                    src[x][y-1][0], src[x][y+1][0] }
.fi
.in -2

.sp
.LP
For 4-neighbor grayscale images, it uses the following equation:
.sp
.in +2
.nf
dst[x][y][0] = MIN{ src[x][y][0],
                    src[x-1][y][0], src[x+1][y][0],
                    src[x][y-1][0], src[x][y+1][0] }
.fi
.in -2

.sp
.LP
where \fBx = 1, ..., w-2; y = 1, ..., h-2\fR.
.SH PARAMETERS
.sp
.LP
The function takes the following arguments:
.sp
.ne 2
.mk
.na
\fB\fIdst\fR\fR
.ad
.RS 7n
.rt  
Pointer to destination image.
.RE

.sp
.ne 2
.mk
.na
\fB\fIsrc\fR\fR
.ad
.RS 7n
.rt  
Pointer to source image.
.RE

.SH RETURN VALUES
.sp
.LP
The function returns \fBMLIB_SUCCESS\fR if successful. Otherwise it returns \fBMLIB_FAILURE\fR.
.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(5) for descriptions of the following attributes:
.sp

.sp
.TS
tab() box;
cw(2.75i) |cw(2.75i) 
lw(2.75i) |lw(2.75i) 
.
ATTRIBUTE TYPEATTRIBUTE VALUE
_
Interface StabilityCommitted
_
MT-LevelMT-Safe
.TE

.SH SEE ALSO
.sp
.LP
\fBmlib_ImageErode4_Fp\fR(3MLIB), \fBmlib_ImageErode8\fR(3MLIB), \fBmlib_ImageErode8_Fp\fR(3MLIB), \fBattributes\fR(5)