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/*
//
// Copyright 2004-2010 SRI International
//
// Copyright 1997-2009 Torsten Rohlfing
//
// 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 __cmtkTypedArrayFunctionHistogramEqualization_h_included_
#define __cmtkTypedArrayFunctionHistogramEqualization_h_included_
#include <cmtkconfig.h>
#include <Base/cmtkTypedArrayFunction.h>
#include <Base/cmtkTypedArray.h>
#include <Base/cmtkHistogram.h>
namespace
cmtk
{
/** \addtogroup Base */
//@{
/** Lookup class for histogram equalization.
*/
class
TypedArrayFunctionHistogramEqualization
/// Inherit from base class.
: public TypedArrayFunction
{
public:
/// This class.
typedef TypedArrayFunctionHistogramEqualization Self;
/// Default number of histogram bins.
static const size_t DefaultNumberOfHistogramBins = 1024;
/// Constructor: build lookup.
TypedArrayFunctionHistogramEqualization( const TypedArray& variableArray, const size_t numberOfHistogramBins = Self::DefaultNumberOfHistogramBins );
/// Map a single value from the variable array to its new value.
virtual Types::DataItem operator()( const Types::DataItem valueIn ) const;
private:
/// Data histogram.
Histogram<unsigned int>::SmartPtr m_Histogram;
/// Scale factor from cumulative distribution to histogram.
Types::DataItem m_ScaleFactor;
/// Minimum data value.
Types::DataItem m_MinValue;
};
//@}
} // namespace cmtk
#endif // #ifndef __cmtkTypedArrayFunctionHistogramEqualization_h_included_
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