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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 "itkCollidingFrontsImageFilter.h"
#include "itkCastImageFilter.h"
#include "itkRescaleIntensityImageFilter.h"
#include "itkImageFileWriter.h"
int itkCollidingFrontsImageFilterTest(int argc, char* argv[] )
{
const unsigned int ImageDimension = 2;
typedef unsigned char PixelType;
typedef float InternalPixelType;
typedef itk::Image<PixelType,ImageDimension> ImageType;
typedef itk::Image<InternalPixelType,ImageDimension> InternalImageType;
//setup uniform image
ImageType::SizeType imageSize;
imageSize[0] = 128;
imageSize[1] = 128;
ImageType::RegionType imageRegion;
imageRegion.SetSize( imageSize );
PixelType background = 64;
ImageType::Pointer inputImage = ImageType::New();
inputImage->SetRegions( imageRegion );
inputImage->Allocate();
inputImage->FillBuffer( background );
typedef itk::CastImageFilter< ImageType, InternalImageType > CastFilterType;
CastFilterType::Pointer caster = CastFilterType::New();
caster->SetInput( inputImage );
typedef itk::CollidingFrontsImageFilter<InternalImageType,InternalImageType> CollidingFrontsFilterType;
CollidingFrontsFilterType::Pointer collidingFronts = CollidingFrontsFilterType::New();
typedef CollidingFrontsFilterType::NodeContainer NodeContainer;
typedef CollidingFrontsFilterType::NodeType NodeType;
//select seeds 20 pixels apart
NodeContainer::Pointer seeds1 = NodeContainer::New();
InternalImageType::IndexType seedPosition1;
seedPosition1[0] = 50;
seedPosition1[1] = 60;
NodeType node1;
node1.SetIndex( seedPosition1 );
node1.SetValue( 0.0 );
seeds1->Initialize();
seeds1->InsertElement( 0, node1 );
NodeContainer::Pointer seeds2 = NodeContainer::New();
InternalImageType::IndexType seedPosition2;
seedPosition2[0] = 70;
seedPosition2[1] = 60;
NodeType node2;
node2.SetIndex( seedPosition2 );
node2.SetValue( 0.0 );
seeds2->Initialize();
seeds2->InsertElement( 0, node2 );
InternalImageType::OffsetType offset = {{60,60}};
double radius = seedPosition2[0] - offset[0];
collidingFronts->SetInput( caster->GetOutput() );
collidingFronts->SetSeedPoints1( seeds1 );
collidingFronts->SetSeedPoints2( seeds2 );
collidingFronts->ApplyConnectivityOn();
try
{
collidingFronts->Update();
}
catch ( itk::ExceptionObject& err )
{
std::cout << err << std::endl;
}
InternalImageType::Pointer output = collidingFronts->GetOutput();
itk::ImageRegionIterator<InternalImageType>
iterator ( output, output->GetBufferedRegion() );
bool passed = true;
for (; !iterator.IsAtEnd(); ++iterator )
{
InternalImageType::IndexType tempIndex;
tempIndex = iterator.GetIndex();
tempIndex -= offset;
double distance = 0.0;
for ( int j = 0; j < 2; j++ )
{
distance += tempIndex[j] * tempIndex[j];
}
distance = std::sqrt( distance );
InternalImageType::PixelType outputPixel = iterator.Get();
// for test to pass, the circle of radius 10 centered in offset
// must be made up only of negative pixels and vice-versa
if (outputPixel < 0.0)
{
//allow half a pixel diagonal tolerance
if (distance > radius + 1.414 / 2.0)
{
std::cout<<outputPixel<<" "<<distance<<std::endl;
passed = false;
}
}
else
{
if (distance < radius)
{
std::cout<<outputPixel<<" "<<distance<<std::endl;
passed = false;
}
}
}
// Optionally writing out the two images
if( argc > 2 )
{
typedef itk::ImageFileWriter< ImageType > WriterType;
WriterType::Pointer writer = WriterType::New();
typedef itk::RescaleIntensityImageFilter< InternalImageType,
ImageType > RescaleFilterType;
RescaleFilterType::Pointer rescaler = RescaleFilterType::New();
writer->SetFileName( argv[1] );
writer->SetInput( inputImage );
writer->Update();
rescaler->SetInput( collidingFronts->GetOutput() );
rescaler->SetOutputMinimum( 0 );
rescaler->SetOutputMaximum( 255 );
writer->SetFileName( argv[2] );
writer->SetInput( rescaler->GetOutput() );
writer->Update();
}
if (!passed)
{
std::cout << "Colliding Fronts test failed. " << std::endl;
return EXIT_FAILURE;
}
collidingFronts->StopOnTargetsOn();
try
{
collidingFronts->Update();
}
catch ( itk::ExceptionObject& err )
{
std::cout << err << std::endl;
}
std::cout << "Colliding Fronts test passed. " << std::endl;
typedef itk::Image<double,ImageDimension> DoubleImageType;
typedef itk::CollidingFrontsImageFilter<DoubleImageType,InternalImageType> CollidingFrontsFilterType2;
CollidingFrontsFilterType2::Pointer collidingFronts2 = CollidingFrontsFilterType2::New();
return EXIT_SUCCESS;
}
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