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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 "itkNarrowBandThresholdSegmentationLevelSetImageFilter.h"
namespace NBTS {
typedef itk::Image<float, 3> ImageType;
typedef itk::Image<char, 3> SeedImageType;
const int V_WIDTH = 64;
const int V_HEIGHT = 64;
const int V_DEPTH = 64;
float sphere(float x, float y, float z)
{
float dis;
dis = (x - (float)V_WIDTH/2.0)*(x - (float)V_WIDTH/2.0)
/((0.2f*V_WIDTH)*(0.2f*V_WIDTH)) +
(y - (float)V_HEIGHT/2.0)*(y - (float)V_HEIGHT/2.0)
/((0.2f*V_HEIGHT)*(0.2f*V_HEIGHT)) +
(z - (float)V_DEPTH/2.0)*(z - (float)V_DEPTH/2.0)
/((0.2f*V_DEPTH)*(0.2f*V_DEPTH));
return(1.0f-dis);
}
void evaluate_function(itk::Image<char, 3> *im,
float (*f)(float, float, float) )
{
itk::Image<char, 3>::IndexType idx;
for(int z = 0; z < V_DEPTH; ++z)
{
idx[2] = z;
for (int y = 0; y < V_HEIGHT; ++y)
{
idx[1] = y;
for (int x = 0; x < V_WIDTH; ++x)
{
idx[0] = x;
if ( f((float)x,(float)y,(float)z) >= 0.0 )
{ im->SetPixel(idx, 1 ); }
else
{ im->SetPixel(idx, 0 ); }
}
}
}
}
} // end namespace
namespace itk {
class NBRMSCommand : public Command
{
public:
/** Smart pointer declaration methods */
typedef NBRMSCommand Self;
typedef Command Superclass;
typedef itk::SmartPointer<Self> Pointer;
typedef itk::SmartPointer<const Self> ConstPointer;
itkTypeMacro( NBRMSCommand, Command );
itkNewMacro(Self);
/** Standard Command virtual methods */
virtual void Execute(Object *caller, const EventObject &) ITK_OVERRIDE
{
std::cout <<
(dynamic_cast<NarrowBandLevelSetImageFilter< ::NBTS::SeedImageType,
::NBTS::ImageType> *>(caller))->GetSegmentationFunction()->GetPropagationWeight()
<< std::endl;
}
virtual void Execute(const Object *, const EventObject &) ITK_OVERRIDE
{
std::cout << "ack" << std::endl;
}
protected:
NBRMSCommand() {}
virtual ~NBRMSCommand() ITK_OVERRIDE {}
};
}
int itkNarrowBandThresholdSegmentationLevelSetImageFilterTest(int, char * [] )
{
NBTS::ImageType::RegionType reg;
NBTS::ImageType::RegionType::SizeType sz;
NBTS::ImageType::RegionType::IndexType idx;
idx[0] = idx[1] = idx[2] = 0;
sz[0] = sz[1] = sz[2] = 64;
reg.SetSize(sz);
reg.SetIndex(idx);
NBTS::ImageType::Pointer inputImage = NBTS::ImageType::New();
NBTS::SeedImageType::Pointer seedImage = NBTS::SeedImageType::New();
inputImage->SetRegions(reg);
seedImage->SetRegions(reg);
inputImage->Allocate();
seedImage->Allocate();
// Starting surface is a sphere in the center of the image.
NBTS::evaluate_function(seedImage, NBTS::sphere);
// Target surface is a diamond
float val;
unsigned int i;
// NBTS::ImageType::IndexType idx;
for (idx[2] = 0; idx[2] < 64; idx[2]++)
for (idx[1] = 0; idx[1] < 64; idx[1]++)
for (idx[0] = 0; idx[0] < 64; idx[0]++)
{
val = 0;
for (i = 0; i < 3; ++i)
{
if (idx[i] < 32) val += idx[i];
else val += 64 - idx[i];
}
inputImage->SetPixel(idx, val);
}
itk::NarrowBandThresholdSegmentationLevelSetImageFilter< ::NBTS::SeedImageType, ::NBTS::ImageType>::Pointer
filter = itk::NarrowBandThresholdSegmentationLevelSetImageFilter< ::NBTS::SeedImageType, ::NBTS::ImageType>::New();
filter->SetInput(seedImage);
filter->SetFeatureImage(inputImage);
filter->SetNumberOfThreads(2);
filter->SetUpperThreshold(63);
filter->SetLowerThreshold(50);
filter->SetMaximumRMSError(0.04); //Does not have any effect
filter->SetNumberOfIterations(10);
filter->ReverseExpansionDirectionOn(); // Change the default behavior of the speed
// function so that negative values result in
// surface growth.
itk::NBRMSCommand::Pointer c = itk::NBRMSCommand::New();
filter->AddObserver(itk::IterationEvent(), c);
filter->SetIsoSurfaceValue(0.5); //<--- IMPORTANT! Default is zero.
try {
filter->Update();
std::cout << "Done first trial" << std::endl;
// Repeat to make sure that the filter is reinitialized properly
filter->SetNumberOfIterations(8);
filter->Update();
std::cout << "Done second trial" << std::endl;
//For Debugging
//typedef itk::ImageFileWriter< ::NBTS::ImageType> WriterType;
//WriterType::Pointer writer = WriterType::New();
//writer->SetInput( filter->GetOutput() );
//writer->SetFileName( "outputThreshold.mhd" );
//writer->Write();
//WriterType::Pointer writer3 = WriterType::New();
//writer3->SetInput(inputImage);
//writer3->SetFileName("inputThreshold.mhd");
//writer3->Write();
// typedef itk::ImageFileWriter< ::NBTS::SeedImageType> Writer2Type;
//Writer2Type::Pointer writer2 = Writer2Type::New();
//writer2->SetInput(seedImage);
//writer2->SetFileName("seedThreshold.mhd");
//writer2->Write();
// Write the output for debugging purposes
// itk::ImageFileWriter<NBTS::ImageType>::Pointer writer
// = itk::ImageFileWriter<NBTS::ImageType>::New();
// itk::RawImageIO<float, 3>::Pointer io = itk::RawImageIO<float, 3>::New();
// io->SetFileTypeToBinary();
// io->SetFileDimensionality(3);
// io->SetByteOrderToLittleEndian();
// writer->SetImageIO(io);
// itk::CastImageFilter<NBTS::SeedImageType, NBTS::ImageType>::Pointer
// caster = itk::CastImageFilter<NBTS::SeedImageType, NBTS::ImageType>::New();
// caster->SetInput(seedImage);
// caster->Update();
// writer->SetInput(caster->GetOutput());
// writer->SetInput(filter->GetSpeedImage());
// writer->SetInput(filter->GetFeatureImage());
// writer->SetInput(inputImage);
// writer->SetInput(filter->GetOutput());
// writer->SetFileName("output.raw");
// writer->Write();
}
catch (itk::ExceptionObject &e)
{
std::cerr << e << std::endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
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