00001
00002 /***************************************************************************
00003  *  square_shrinker.cpp - Implementation of SquareShrinker
00004  *
00005  *  Created: Tue Apr 22 2008 20:58:40 (GO2008, day 4)
00006  *  Copyright  2005-2008  Tim Niemueller [www.niemueller.de]
00007  *
00008  ****************************************************************************/
00009
00010 /*  This program is free software; you can redistribute it and/or modify
00011  *  it under the terms of the GNU General Public License as published by
00012  *  the Free Software Foundation; either version 2 of the License, or
00013  *  (at your option) any later version. A runtime exception applies to
00014  *  this software (see LICENSE.GPL_WRE file mentioned below for details).
00015  *
00016  *  This program is distributed in the hope that it will be useful,
00017  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00018  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00019  *  GNU Library General Public License for more details.
00020  *
00021  *  Read the full text in the LICENSE.GPL_WRE file in the doc directory.
00022  */
00023
00024 #include <classifiers/square_shrinker.h>
00025
00026 #include <fvutils/color/colorspaces.h>
00027 #include <fvutils/base/roi.h>
00028
00029 #include <models/scanlines/scanlinemodel.h>
00030 #include <models/color/colormodel.h>
00031
00032 #include <cstddef>
00033 
00034 /** @class SquareShrinker <classifiers/square_shrinker.h>
00035  * Square shrinker.
00036  * This shrinker makes sure that a ROI is always squared.
00037  * @author Tim Niemueller
00038  */
00039 
00040 /** Constructor. */
00041 SquareShrinker::SquareShrinker()
00042   : Shrinker()
00043 {
00044 }
00045
00046 
00047 /** Shrink!
00048  * Do the actual shrinking.
00049  * @param roi ROI to shrink
00050  */
00051 void
00052 SquareShrinker::shrink( ROI *roi )
00053 {
00054   if ( roi->width < roi->height ) {
00055     roi->start.y += (roi->height - roi->width) / 2;
00056     roi->height = roi->width;
00057   } else if ( roi->width > roi->height) {
00058     roi->start.x += (roi->width - roi->height) / 2;
00059     roi->width = roi->height;
00060   }
00061 }