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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: 2398 $
//
// $LastChangedDate: 2010-10-05 14:54:37 -0700 (Tue, 05 Oct 2010) $
//
// $LastChangedBy: torstenrohlfing $
//
*/
#include <GPU/cmtkDeviceHistogram.h>
#include <cuda_runtime_api.h>
#include <math.h>
#include <Base/cmtkFixedVector.h>
int
checkEntropy( const std::string& testName, const float hData[100], cmtk::DeviceHistogram& dHist, const float baseline )
{
dHist.GetDataOnDevice().CopyToDevice( hData, 100 );
const float entropy = dHist.GetEntropy();
if ( fabs( entropy - baseline ) > 1e-5 )
{
std::cerr << "Test " << testName << " entropy " << entropy << " deviates from baseline " << baseline << std::endl;
return 1;
}
return 0;
}
// test "DeviceHistogram" class
int
testDeviceHistogramEntropy()
{
try
{
cmtk::DeviceHistogram::SmartPtr histogram100 = cmtk::DeviceHistogram::Create( 100 );
cmtk::DeviceHistogram::SmartPtr histogram200 = cmtk::DeviceHistogram::Create( 200 );
float floatHost[100];
// compute entropy for all-zeros
for ( size_t i = 0; i < 100; ++i )
floatHost[i] = 0;
if ( checkEntropy( "AllZeros100", floatHost, *histogram100, 0 ) || checkEntropy( "AllZeros200", floatHost, *histogram200, 0 ) )
return 1;
// compute entropy for single non-zero bin
floatHost[0] = 1;
if ( checkEntropy( "SingleBin100", floatHost, *histogram100, 0 ) || checkEntropy( "SingleBin200", floatHost, *histogram200, 0 ) )
return 1;
// compute entropy for all-ones
for ( size_t i = 0; i < 100; ++i )
floatHost[i] = 1;
if ( checkEntropy( "AllOnes100", floatHost, *histogram100, 4.60517 ) || checkEntropy( "AllOnes200", floatHost, *histogram200, 4.60517 ) )
return 1;
// compute entropy for 50x 0, 50x 1
for ( size_t i = 0; i < 50; ++i )
floatHost[i] = 0;
if ( checkEntropy( "50One50Zero100", floatHost, *histogram100, 3.91202 ) || checkEntropy( "50One50Zero200", floatHost, *histogram200, 3.91202 ) )
return 1;
// compute entropy for 50x "0 1" alternating
for ( size_t i = 0; i < 50; ++i )
{
floatHost[i<<1] = 1;
floatHost[1+(i<<1)] = 0;
}
if ( checkEntropy( "50OneZeroPairs100", floatHost, *histogram100, 3.91202 ) || checkEntropy( "50OneZeroPairs200", floatHost, *histogram200, 3.91202 ) )
return 1;
}
catch ( std::bad_alloc )
{
std::cerr << "Caught bad_alloc()" << std::endl;
return 1;
}
return 0;
}
template<size_t NBINS>
int
compareHistogramToBaseline( const cmtk::DeviceHistogram& histD, const float* base )
{
cmtk::FixedVector<NBINS,float> histogram;
histD.GetDataOnDevice().CopyToHost( &histogram[0], NBINS );
for ( size_t j = 0; j < NBINS; ++j )
{
if ( histogram[j] != base[j] )
{
std::cerr << "actual\tbaseline" << std::endl;
for ( size_t i = 0; i < NBINS; ++i )
{
std::cerr << histogram[i] << "\t" << base[i] << std::endl;
}
std::cerr << std::endl;
return 1;
}
}
return 0;
}
int
testDeviceHistogramPopulate()
{
try
{
cmtk::DeviceHistogram::SmartPtr histogramD = cmtk::DeviceHistogram::Create( 4 );
const float data[10] = { 0, 6, 3, 7, 2, 2, 8, 8, 1, 10 };
cmtk::DeviceMemory<float>::SmartPtr dataD = cmtk::DeviceMemory<float>::Create( 10, data );
// reset histogram
histogramD->Reset();
const float baseline0[4] = { 0, 0, 0, 0 };
if ( compareHistogramToBaseline<4>( *histogramD, baseline0 ) )
return 1;
// populate histogram from data
histogramD->Populate( *dataD, 0.0 /*rangeFrom*/, 10.0 /*rangeTo*/ );
const float baseline1[4] = { 5, 1, 3, 1 };
if ( compareHistogramToBaseline<4>( *histogramD, baseline1 ) )
return 1;
// add same data to histogram second time without reset
histogramD->Populate( *dataD, 0.0 /*rangeFrom*/, 10.0 /*rangeTo*/ );
const float baseline2[4] = { 10, 2, 6, 2 };
if ( compareHistogramToBaseline<4>( *histogramD, baseline2 ) )
return 1;
// reset and populate histogram using mask
const int mask[10] = { 0, 0, 1, 1, 0, 0, 0, 1, 1, 1 };
cmtk::DeviceMemory<int>::SmartPtr maskD = cmtk::DeviceMemory<int>::Create( 10, mask );
histogramD->Reset();
histogramD->Populate( *dataD, *maskD, 0.0 /*rangeFrom*/, 10.0 /*rangeTo*/ );
const float baseline3[4] = { 2, 0, 2, 1 };
if ( compareHistogramToBaseline<4>( *histogramD, baseline3 ) )
return 1;
}
catch ( std::bad_alloc )
{
std::cerr << "Caught bad_alloc()" << std::endl;
return 1;
}
return 0;
}
int
testDeviceHistogramPopulateLog()
{
try
{
cmtk::DeviceHistogram::SmartPtr histogramD = cmtk::DeviceHistogram::Create( 4 );
const float data[10] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
cmtk::DeviceMemory<float>::SmartPtr dataD = cmtk::DeviceMemory<float>::Create( 10, data );
// reset histogram
histogramD->Reset();
const float baseline0[4] = { 0, 0, 0, 0 };
if ( compareHistogramToBaseline<4>( *histogramD, baseline0 ) )
return 1;
// populate histogram from data
histogramD->Populate( *dataD, 0.0 /*rangeFrom*/, 9.0 /*rangeTo*/, true /*logScale*/ );
const float baseline1[4] = { 4, 3, 3, 0 };
if ( compareHistogramToBaseline<4>( *histogramD, baseline1 ) )
return 1;
// add same data to histogram second time without reset
histogramD->Populate( *dataD, 0.0 /*rangeFrom*/, 9.0 /*rangeTo*/, true /*logScale*/ );
const float baseline2[4] = { 8, 6, 6, 0 };
if ( compareHistogramToBaseline<4>( *histogramD, baseline2 ) )
return 1;
// reset and populate histogram using mask
const int mask[10] = { 0, 0, 1, 1, 0, 0, 0, 1, 1, 1 };
cmtk::DeviceMemory<int>::SmartPtr maskD = cmtk::DeviceMemory<int>::Create( 10, mask );
histogramD->Reset();
histogramD->Populate( *dataD, *maskD, 0.0 /*rangeFrom*/, 9.0 /*rangeTo*/, true /*logScale*/ );
const float baseline3[4] = { 2, 0, 3, 0 };
if ( compareHistogramToBaseline<4>( *histogramD, baseline3 ) )
return 1;
}
catch ( std::bad_alloc )
{
std::cerr << "Caught bad_alloc()" << std::endl;
return 1;
}
return 0;
}
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