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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 $
//
*/
#include "cmtkDeviceHistogram.h"
#include "cmtkDeviceHistogram_kernels.h"
#include <System/cmtkException.h>
#include <System/cmtkMemory.h>
cmtk::DeviceHistogram
::DeviceHistogram( const size_t numberOfBins )
{
this->m_NumberOfBins = numberOfBins;
this->m_NumberOfBinsPadded = cmtk::Memory::GetNextPowerOfTwo( this->m_NumberOfBins );
if ( this->m_NumberOfBinsPadded > 512 )
{
throw Exception( "Exceeded maximum number of histogram bins (512)" );
}
this->m_OnDeviceData = DeviceMemory<float>::Create( this->m_NumberOfBinsPadded );
this->m_OnDeviceData->SetToZero();
this->m_OnDeviceResult = DeviceMemory<float>::Create( this->m_NumberOfBinsPadded );
this->m_OnDeviceResult->SetToZero();
}
void
cmtk::DeviceHistogram
::Reset()
{
this->m_OnDeviceData->SetToZero();
}
void
cmtk::DeviceHistogram
::Populate( const DeviceMemory<float>& dataOnDevice, const float rangeFrom, const float rangeTo, const bool logScale )
{
cmtkDeviceHistogramPopulate( this->m_OnDeviceData->Ptr(), dataOnDevice.Ptr(), rangeFrom, rangeTo, logScale, this->m_NumberOfBins, dataOnDevice.GetNumberOfItems() );
}
void
cmtk::DeviceHistogram
::Populate( const DeviceMemory<float>& dataOnDevice, const DeviceMemory<int>& maskOnDevice, const float rangeFrom, const float rangeTo, const bool logScale )
{
cmtkDeviceHistogramPopulate( this->m_OnDeviceData->Ptr(), dataOnDevice.Ptr(), maskOnDevice.Ptr(), rangeFrom, rangeTo, logScale, this->m_NumberOfBins, dataOnDevice.GetNumberOfItems() );
}
float
cmtk::DeviceHistogram
::GetEntropy() const
{
cmtkDeviceHistogramEntropy( this->m_OnDeviceResult->Ptr(), this->m_OnDeviceData->Ptr(), this->m_NumberOfBinsPadded );
float result;
this->m_OnDeviceResult->CopyToHost( &result, 1 );
return result;
}
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