84 lines
2.1 KiB
C
84 lines
2.1 KiB
C
/* @(#) Reduces the spatial resolution of an image by increasing the
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* @(#) pixel size
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* @(#)
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* @(#) Usage: spatres in out step
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* @(#)
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*
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* Copyright: 1991, N. Dessipris.
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*
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* Author: Nicos Dessipris
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* Written on: 27/03/1991
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* Modified on :
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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 <vips/intl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <vips/vips.h>
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int
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main( int argc, char **argv )
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{
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IMAGE *in, *out;
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int step = 0;
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if( im_init_world( argv[0] ) )
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error_exit( "unable to start VIPS" );
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if ( (argc != 4)||(argv[1][0] == '-') )
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error_exit(
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"Usage:\n%s in out step\n\n\
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WARNING: The program destroys the opfile if the owner has rw access on it.",
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argv[0]);
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step = atoi(argv[3]);
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if ((in= im_open(argv[1],"r")) == NULL)
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error_exit("Unable to open %s for input", argv[1]);
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if ( (out=im_open(argv[2],"w")) == NULL )
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error_exit("Unable to open %s", argv[2]);
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if ( im_spatres(in, out, step) == -1)
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error_exit("Unable to im_spatres");
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if ( im_updatehist(out, argv[0], argc - 1, argv + 1) == -1)
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error_exit("Unable to update history");
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if ( (im_close(in) == -1)||(im_close(out) == -1) )
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error_exit("unable to close %s or %s",argv[1],argv[2]);
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return(0);
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}
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