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/*=========================================================================
*
* Copyright Insight Software Consortium
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
/**
* Test program for itkGPUMeanImageFilter class
*
* This program creates a GPU Mean filter test pipelining.
*/
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"
#include "itkMeanImageFilter.h"
#include "itkGPUImage.h"
#include "itkGPUKernelManager.h"
#include "itkGPUContextManager.h"
#include "itkGPUImageToImageFilter.h"
#include "itkGPUMeanImageFilter.h"
#include "itkTimeProbe.h"
/**
* Testing GPU Mean Image Filter
*/
template< unsigned int VImageDimension >
int runGPUMeanImageFilterTest(const std::string& inFile, const std::string& outFile)
{
typedef unsigned char InputPixelType;
typedef unsigned char OutputPixelType;
typedef itk::GPUImage< InputPixelType, VImageDimension > InputImageType;
typedef itk::GPUImage< OutputPixelType, VImageDimension > OutputImageType;
typedef itk::ImageFileReader< InputImageType > ReaderType;
typedef itk::ImageFileWriter< OutputImageType > WriterType;
typename ReaderType::Pointer reader = ReaderType::New();
typename WriterType::Pointer writer = WriterType::New();
reader->SetFileName( inFile );
writer->SetFileName( outFile );
//
// Note: We use regular itk filter type here but factory will automatically create
// GPU filter for Median filter and CPU filter for threshold filter.
//
typedef itk::MeanImageFilter< InputImageType, OutputImageType > MeanFilterType;
typedef itk::GPUMeanImageFilter< InputImageType, OutputImageType > GPUMeanFilterType;
// Mean filter kernel radius
typename InputImageType::SizeType indexRadius;
indexRadius[0] = 2; // radius along x
indexRadius[1] = 2; // radius along y
if ( VImageDimension > 2 )
{
indexRadius[2] = 2; // radius along z
}
// test 1~8 threads for CPU
for(int nThreads = 1; nThreads <= 8; nThreads++)
{
typename MeanFilterType::Pointer CPUFilter = MeanFilterType::New();
itk::TimeProbe cputimer;
cputimer.Start();
CPUFilter->SetNumberOfThreads( nThreads );
CPUFilter->SetInput( reader->GetOutput() );
CPUFilter->SetRadius( indexRadius );
CPUFilter->Update();
cputimer.Stop();
std::cout << "CPU mean filter took " << cputimer.GetMean() << " seconds with "
<< CPUFilter->GetNumberOfThreads() << " threads.\n" << std::endl;
// -------
if( nThreads == 8 )
{
typename GPUMeanFilterType::Pointer GPUFilter = GPUMeanFilterType::New();
itk::TimeProbe gputimer;
gputimer.Start();
GPUFilter->SetInput( reader->GetOutput() );
GPUFilter->SetRadius( indexRadius );
GPUFilter->Update();
GPUFilter->GetOutput()->UpdateBuffers(); // synchronization point (GPU->CPU memcpy)
gputimer.Stop();
std::cout << "GPU mean filter took " << gputimer.GetMean() << " seconds.\n" << std::endl;
writer->SetInput( GPUFilter->GetOutput() );
writer->Update();
}
}
return EXIT_SUCCESS;
}
int itkGPUMeanImageFilterTest(int argc, char *argv[])
{
if(!itk::IsGPUAvailable())
{
std::cerr << "OpenCL-enabled GPU is not present." << std::endl;
return EXIT_FAILURE;
}
if( argc < 3 )
{
std::cerr << "Error: missing arguments" << std::endl;
std::cerr << "inputfile outputfile [num_dimensions]" << std::endl;
return EXIT_FAILURE;
}
std::string inFile( argv[1] );
std::string outFile( argv[2] );
unsigned int dim = 3;
if( argc >= 4 )
{
dim = atoi( argv[3] );
}
if( dim == 2 )
{
return runGPUMeanImageFilterTest<2>(inFile, outFile);
}
else if( dim == 3 )
{
return runGPUMeanImageFilterTest<3>(inFile, outFile);
}
else
{
std::cerr << "Error: only 2 or 3 dimensions allowed, " << dim << " selected." << std::endl;
return EXIT_FAILURE;
}
}
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