cmtkDeviceHistogram.h

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/*
//
//  Copyright 2010 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: 2184 $
//
//  $LastChangedDate: 2010-08-06 16:03:41 -0700 (Fri, 06 Aug 2010) $
//
//  $LastChangedBy: torstenrohlfing $
//
*/

#ifndef __cmtkDeviceHistogram_h_included_
#define __cmtkDeviceHistogram_h_included_

#include <cmtkconfig.h>

#include "cmtkDeviceMemory.h"

namespace
cmtk
{


class DeviceHistogram
{
public:
  typedef DeviceHistogram Self;

  typedef SmartPointer<Self> SmartPtr;

  static Self::SmartPtr Create( const size_t numberOfBins  )
  {
    return Self::SmartPtr( new Self( numberOfBins ) );
  }
  
  DeviceMemory<float>& GetDataOnDevice()
  {
    return *(this->m_OnDeviceData);
  }

  const DeviceMemory<float>& GetDataOnDevice() const
  {
    return *(this->m_OnDeviceData);
  }

  void Reset();

  void Populate( const DeviceMemory<float>& dataOnDevice, const float rangeFrom, const float rangeTo, const bool logScale = false );

  void Populate( const DeviceMemory<float>& dataOnDevice, const DeviceMemory<int>& maskOnDevice, const float rangeFrom, const float rangeTo, const bool logScale = false );

  float GetEntropy() const;

private:
  DeviceHistogram( const size_t numberOfBins );

  size_t m_NumberOfBins;

  size_t m_NumberOfBinsPadded;

  DeviceMemory<float>::SmartPtr m_OnDeviceData;

  mutable DeviceMemory<float>::SmartPtr m_OnDeviceResult;
};

} // namespace cmtk

#endif // #ifndef __cmtkDeviceHistogram_h_included_