cmtkNearestNeighborInterpolator.h

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00001 /*
00002 //
00003 //  Copyright 1997-2009 Torsten Rohlfing
00004 //  Copyright 2004-2009 SRI International
00005 //
00006 //  This file is part of the Computational Morphometry Toolkit.
00007 //
00008 //  http://www.nitrc.org/projects/cmtk/
00009 //
00010 //  The Computational Morphometry Toolkit is free software: you can
00011 //  redistribute it and/or modify it under the terms of the GNU General Public
00012 //  License as published by the Free Software Foundation, either version 3 of
00013 //  the License, or (at your option) any later version.
00014 //
00015 //  The Computational Morphometry Toolkit is distributed in the hope that it
00016 //  will be useful, but WITHOUT ANY WARRANTY; without even the implied
00017 //  warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00018 //  GNU General Public License for more details.
00019 //
00020 //  You should have received a copy of the GNU General Public License along
00021 //  with the Computational Morphometry Toolkit.  If not, see
00022 //  <http://www.gnu.org/licenses/>.
00023 //
00024 //  $Revision: 11 $
00025 //
00026 //  $LastChangedDate: 2009-05-30 11:30:08 -0700 (Sat, 30 May 2009) $
00027 //
00028 //  $LastChangedBy: torstenrohlfing $
00029 //
00030 */
00031 
00032 #ifndef __cmtkNearestNeighborInterpolator_h_included_
00033 #define __cmtkNearestNeighborInterpolator_h_included_
00034 
00035 #include <cmtkconfig.h>
00036 
00037 namespace
00038 cmtk
00039 {
00040 
00043 namespace 
00044 Interpolators
00045 {
00046 
00048 class NearestNeighbor
00049 {
00050 public:
00052   static const int RegionSizeLeftRight = 1;
00053 
00055   static Types::Coordinate GetWeight( const int weight, const Types::Coordinate x )
00056   {
00057     switch (weight)
00058       {
00059       case 0: 
00060         return (x<=0.5) ? 1 : 0;
00061       case 1:
00062         return (x>0.5) ? 1 : 0;
00063       default:
00064 #ifdef DEBUG
00065         std::cerr << "weight=" << weight << " shouldn't happen!" << std::endl;
00066         exit( 1 );
00067 #endif
00068         break;
00069       }
00070     return 0;
00071   }
00072 };
00073 
00074 } // namespace Interpolators
00075 } // namespace cmtk
00076 
00077 #endif
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