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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: 5436 $
//
// $LastChangedDate: 2018-12-10 19:01:20 -0800 (Mon, 10 Dec 2018) $
//
// $LastChangedBy: torstenrohlfing $
//
*/
#ifndef __cmtkDeviceHistogram_h_included_
#define __cmtkDeviceHistogram_h_included_
#include <cmtkconfig.h>
#include "cmtkDeviceMemory.h"
namespace
cmtk
{
/** \addtogroup GPU */
//@{
/// Device memory representation of a uniform volume with static helper functions.
class DeviceHistogram
{
public:
/// This class.
typedef DeviceHistogram Self;
/// Smart pointer to this class.
typedef SmartPointer<Self> SmartPtr;
/// Create device representation of volume object.
static Self::SmartPtr Create( const size_t numberOfBins /*!< Allocate device memory for data as multiple of this value.*/ )
{
return Self::SmartPtr( new Self( numberOfBins ) );
}
/// Return device data pointer.
DeviceMemory<float>& GetDataOnDevice()
{
return *(this->m_OnDeviceData);
}
/// Return device data pointer.
const DeviceMemory<float>& GetDataOnDevice() const
{
return *(this->m_OnDeviceData);
}
/// Reset histogram, i.e., set all bins to zero.
void Reset();
/// Populate histogram from data on device.
void Populate( const DeviceMemory<float>& dataOnDevice, const float rangeFrom, const float rangeTo, const bool logScale = false );
/// Populate histogram from data on device using binary mask.
void Populate( const DeviceMemory<float>& dataOnDevice, const DeviceMemory<int>& maskOnDevice, const float rangeFrom, const float rangeTo, const bool logScale = false );
/// Get entropy.
float GetEntropy() const;
private:
/// Constructor.
DeviceHistogram( const size_t numberOfBins );
/// User-selected number of bins.
size_t m_NumberOfBins;
/// Number of bins after padding to power of 2.
size_t m_NumberOfBinsPadded;
/// Managed device memory pointer to histogram data.
DeviceMemory<float>::SmartPtr m_OnDeviceData;
/// Managed device memory pointer to result of histogram operations.
mutable DeviceMemory<float>::SmartPtr m_OnDeviceResult;
};
} // namespace cmtk
#endif // #ifndef __cmtkDeviceHistogram_h_included_
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