libvips/libsrc/arithmetic/im_cmulnorm.c

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2007-08-29 18:23:50 +02:00
/* @(#) Multiplies two complex images. complex output is normalised to 1
* @(#) Inputs can be complex double or complex float
* @(#) Result (double complex or float complex) depends on inputs
* @(#) Function im_cmulnorm() assumes that the both input files
* @(#) are either memory mapped or in a buffer.
* @(#) Images must have the same no of bands and must be complex
* @(#) No check for overflow is carried out.
* @(#)
* @(#) int im_cmulnorm(in1, in2, out)
* @(#) IMAGE *in1, *in2, *out;
* @(#)
* @(#) Returns 0 on success and -1 on error
* @(#)
*
* 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
*/
/*
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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>
#ifdef WITH_DMALLOC
#include <dmalloc.h>
#endif /*WITH_DMALLOC*/
int
im_cmulnorm( IMAGE *in1, IMAGE *in2, IMAGE *out )
{
IMAGE *t1 = im_open_local( out, "im_cmulnorm:1", "p" );
if( !t1 || im_multiply( in1, in2, t1 ) || im_sign( t1, out ) )
return( -1 );
return( 0 );
}