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/* im_cmulnorm.c
*
* Copyright: 1990, N. Dessipris.
*
* Author: Nicos Dessipris
* Written on: 02/05/1990
* Modified on:
* 15/4/97 JC
* - thrown away and redone in terms of im_multiply()
* 9/7/02 JC
* - im_sign() broken out, done in terms of that
* 28/8/09
* - gtkdoc
* - tiny polish
*/
/*
This file is part of VIPS.
VIPS is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
/*
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /*HAVE_CONFIG_H*/
#include <vips/intl.h>
#include <vips/vips.h>
#include <stdio.h>
#include <stdlib.h>
/**
* im_cmulnorm
* @in1: input #IMAGE 1
* @in2: input #IMAGE 2
* @out: output #IMAGE
*
* im_cmulnorm() multiplies two complex images. The complex output is
* normalised to 1 by dividing both the real and the imaginary part of each
* pel with the norm. This is useful for phase correlation.
*
* This operation used to be important, but now simply calls im_multiply()
* then im_sign().
*
* See also: im_multiply(), im_sign().
*
* Returns: 0 on success, -1 on error
*/
int
im_cmulnorm( IMAGE *in1, IMAGE *in2, IMAGE *out )
{
IMAGE *t1;
if( !(t1 = im_open_local( out, "im_cmulnorm:1", "p" )) ||
im_multiply( in1, in2, t1 ) ||
im_sign( t1, out ) )
return( -1 );
return( 0 );
}
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