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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.
*
*=========================================================================*/
#include "itkCentralDifferenceImageFunction.h"
#include "itkImageRegionIteratorWithIndex.h"
int itkCentralDifferenceImageFunctionSpeedTest(int argc, char* argv[] )
{
if( argc != 6 )
{
std::cerr << "usage: size reps doEAI doEACI doE" << std::endl;
return EXIT_FAILURE;
}
int imageSize = atoi( argv[1] );
int reps = atoi( argv[2] );
bool doEAI = atoi( argv[3] );
bool doEACI = atoi( argv[4] );
bool doE = atoi( argv[5] );
std::cout << "imageSize: " << imageSize << " reps: " << reps << " doEAI, doEACI, doE: " << doEAI << ", " << doEACI << ", " << doE << std::endl;
const unsigned int ImageDimension = 2;
typedef unsigned int PixelType;
typedef itk::Image<PixelType,ImageDimension> ImageType;
ImageType::Pointer image = ImageType::New();
ImageType::SizeType size;
size.Fill( imageSize );
ImageType::RegionType region( size );
image->SetRegions( region );
image->Allocate();
// make a test image
typedef itk::ImageRegionIteratorWithIndex<ImageType> Iterator;
Iterator iter( image, region );
iter.GoToBegin();
unsigned int counter = 0;
while ( !iter.IsAtEnd() )
{
iter.Set( counter );
++counter;
++iter;
}
// set up central difference calculator
typedef float CoordRepType;
typedef itk::CentralDifferenceImageFunction<ImageType,CoordRepType> FunctionType;
typedef FunctionType::OutputType OutputType;
FunctionType::Pointer function = FunctionType::New();
function->SetInputImage( image );
ImageType::IndexType index;
OutputType total;
total.Fill( 0 );
std::cout << "UseImageDirection: " << function->GetUseImageDirection() << std::endl;
///loop
for( int l=0; l < reps; l++ )
{
iter.GoToBegin();
while( !iter.IsAtEnd() )
{
index = iter.GetIndex();
if( doEAI )
{
OutputType indexOutput = function->EvaluateAtIndex( index );
total += indexOutput;
}
if( doEACI )
{
FunctionType::ContinuousIndexType cindex;
cindex[0] = index[0] + 0.1;
cindex[1] = index[1] + 0.1;
OutputType continuousIndexOutput = function->EvaluateAtContinuousIndex( cindex );
total += continuousIndexOutput;
}
if( doE )
{
FunctionType::PointType point;
image->TransformIndexToPhysicalPoint( index, point );
OutputType pointOutput = function->Evaluate( point );
total += pointOutput;
}
++iter;
}
}
std::cout << "total: " << total << std::endl;
return EXIT_SUCCESS;
}
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