84 lines
2.0 KiB
C
84 lines
2.0 KiB
C
/* im_cmulnorm.c
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*
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* Copyright: 1990, N. Dessipris.
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*
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* Author: Nicos Dessipris
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* Written on: 02/05/1990
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* Modified on:
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* 15/4/97 JC
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* - thrown away and redone in terms of im_multiply()
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* 9/7/02 JC
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* - im_sign() broken out, done in terms of that
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* 28/8/09
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* - gtkdoc
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* - tiny polish
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*/
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/*
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This file is part of VIPS.
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VIPS is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA
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*/
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/*
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These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif /*HAVE_CONFIG_H*/
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#include <glib/gi18n-lib.h>
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#include <vips/vips.h>
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#include <vips/vips7compat.h>
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#include <stdio.h>
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#include <stdlib.h>
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/**
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* im_cmulnorm
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* @in1: input #IMAGE 1
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* @in2: input #IMAGE 2
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* @out: output #IMAGE
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*
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* im_cmulnorm() multiplies two complex images. The complex output is
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* normalised to 1 by dividing both the real and the imaginary part of each
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* pel with the norm. This is useful for phase correlation.
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*
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* This operation used to be important, but now simply calls im_multiply()
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* then im_sign().
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*
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* See also: im_multiply(), im_sign().
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*
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* Returns: 0 on success, -1 on error
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*/
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int
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im_cmulnorm( IMAGE *in1, IMAGE *in2, IMAGE *out )
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{
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IMAGE *t1;
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if( !(t1 = im_open_local( out, "im_cmulnorm:1", "p" )) ||
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im_multiply( in1, in2, t1 ) ||
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im_sign( t1, out ) )
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return( -1 );
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return( 0 );
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}
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