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/*
//
// Copyright 1997-2009 Torsten Rohlfing
//
// Copyright 2004-2012 SRI International
//
// This file is part of the Computational Morphometry Toolkit.
//
// http://www.nitrc.org/projects/cmtk/
//
// The Computational Morphometry Toolkit is free software: you can
// redistribute it and/or modify it under the terms of the GNU General Public
// License as published by the Free Software Foundation, either version 3 of
// the License, or (at your option) any later version.
//
// The Computational Morphometry Toolkit 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with the Computational Morphometry Toolkit. If not, see
// <http://www.gnu.org/licenses/>.
//
// $Revision: 5436 $
//
// $LastChangedDate: 2018-12-10 19:01:20 -0800 (Mon, 10 Dec 2018) $
//
// $LastChangedBy: torstenrohlfing $
//
*/
#ifndef __cmtkDistanceMap_h_included_
#define __cmtkDistanceMap_h_included_
#include <cmtkconfig.h>
namespace
cmtk
{
/** \addtogroup Base */
//@{
/** Base class for distance map template class.
* This class provides typedefs and static constants that do not depend on the
* template parameter of the derived class template.
*/
class DistanceMap
{
public:
/// Constant used to mark unprocessed pixels.
static const long int EDT_MAX_DISTANCE_SQUARED = 2147329548;
/** Enumeration with binary flags that control distance map computation.
* The defined values can be combined by arithmetic "or".
*/
typedef enum
{
/** No special functions.
* This flag will create a distance-from-feature map where any non-zero
* voxel in the feature image will be considered.
*/
DEFAULT = 0,
/** Compute distance-from-background map.
* The resulting distance values will be non-zero at all feature voxels,
* specifying the distance to the nearest non-feature voxel.
*/
INSIDE = 1,
/** Compute "inside", rather than "outside" map. Ths essentially inverts
* the mask.
*/
VALUE_EXACT = 2,
/** Use specific feature value.
* If this flag is set, only voxels in the feature image with values equal
* to or larger than a given constant will be considered feature voxels.
* All voxels with lower values will be considered background voxels.
*/
VALUE_WINDOW = 4,
/** Use window around specific feature value.
* If this flag is set, only voxels in the feature image with values that are
* within a range from a given constant will be considered feature voxels.
* All voxels with lower values will be considered background voxels.
*/
VALUE_THRESHOLD = 8,
/** Compute signed distance map.
* The "INSIDE" flag determines whether negative distance values are assigned to
* pixels inside (flag off) or outside (flag on) the labelled region.
*/
SIGNED = 16,
/** Compute squared distance - do not apply final sqrt() operator.
* This can increase efficiency if the outside code wants the squared distance in the first place.
*/
SQUARED = 32
} Flags;
};
//@}
} // namespace cmtk
#endif // #ifndef __cmtkDistanceMap_h_included_
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