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itkExpectationBasedPointSetMetricTest.cxx
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itkExpectationBasedPointSetMetricTest.cxx
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/*=========================================================================
*
* Copyright NumFOCUS
*
* 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 "itkExpectationBasedPointSetToPointSetMetricv4.h"
#include "itkTranslationTransform.h"
#include <fstream>
#include "itkMath.h"
#include "itkTestingMacros.h"
template <unsigned int Dimension>
int
itkExpectationBasedPointSetMetricTestRun()
{
using PointSetType = itk::PointSet<unsigned char, Dimension>;
using PointType = typename PointSetType::PointType;
auto fixedPoints = PointSetType::New();
fixedPoints->Initialize();
auto movingPoints = PointSetType::New();
movingPoints->Initialize();
// Produce two simple point sets of 1) a circle and 2) the same circle with an offset;
PointType offset;
for (unsigned int d = 0; d < Dimension; ++d)
{
offset[d] = 2;
}
unsigned long count = 0;
for (float theta = 0; theta < 2.0 * itk::Math::pi; theta += 0.1)
{
PointType fixedPoint;
float radius = 100.0;
fixedPoint[0] = radius * std::cos(theta);
fixedPoint[1] = radius * std::sin(theta);
if (Dimension > 2)
{
fixedPoint[2] = radius * std::sin(theta);
}
fixedPoints->SetPoint(count, fixedPoint);
PointType movingPoint;
movingPoint[0] = fixedPoint[0] + offset[0];
movingPoint[1] = fixedPoint[1] + offset[1];
if (Dimension > 2)
{
movingPoint[2] = fixedPoint[2] + offset[2];
}
movingPoints->SetPoint(count, movingPoint);
count++;
}
// Simple translation transform for moving point set
using TranslationTransformType = itk::TranslationTransform<double, Dimension>;
auto translationTransform = TranslationTransformType::New();
translationTransform->SetIdentity();
// Instantiate the metric
using PointSetMetricType = itk::ExpectationBasedPointSetToPointSetMetricv4<PointSetType>;
auto metric = PointSetMetricType::New();
ITK_EXERCISE_BASIC_OBJECT_METHODS(metric, ExpectationBasedPointSetToPointSetMetricv4, PointSetToPointSetMetricv4);
typename PointSetMetricType::CoordRepType pointSetSigma = 1.0;
metric->SetPointSetSigma(pointSetSigma);
ITK_TEST_SET_GET_VALUE(pointSetSigma, metric->GetPointSetSigma());
unsigned int evaluationKNeighborhood = 50;
metric->SetEvaluationKNeighborhood(evaluationKNeighborhood);
ITK_TEST_SET_GET_VALUE(evaluationKNeighborhood, metric->GetEvaluationKNeighborhood());
metric->SetFixedPointSet(fixedPoints);
metric->SetMovingPointSet(movingPoints);
metric->SetMovingTransform(translationTransform);
metric->Initialize();
typename PointSetMetricType::MeasureType value = metric->GetValue(), value2;
typename PointSetMetricType::DerivativeType derivative, derivative2;
metric->GetDerivative(derivative);
metric->GetValueAndDerivative(value2, derivative2);
int result = EXIT_SUCCESS;
std::cout << "value: " << value << std::endl;
std::cout << "derivative: " << derivative << std::endl;
for (unsigned int d = 0; d < metric->GetNumberOfParameters(); ++d)
{
if (itk::Math::abs(derivative[d] - offset[d]) / offset[d] > 0.01)
{
std::cerr << "derivative does not match expected offset of " << offset << std::endl;
result = EXIT_FAILURE;
}
}
// Check for the same results from different methods
if (itk::Math::NotExactlyEquals(value, value2))
{
std::cerr << "value does not match between calls to different methods: "
<< "value: " << value << " value2: " << value2 << std::endl;
result = EXIT_FAILURE;
}
if (derivative != derivative2)
{
std::cerr << "derivative does not match between calls to different methods: "
<< "derivative: " << derivative << " derivative2: " << derivative2 << std::endl;
result = EXIT_FAILURE;
}
std::ofstream moving_str1("sourceMoving.txt");
std::ofstream moving_str2("targetMoving.txt");
count = 0;
moving_str1 << "0 0 0 0" << std::endl;
moving_str2 << "0 0 0 0" << std::endl;
typename PointType::VectorType vector;
for (unsigned int d = 0; d < metric->GetNumberOfParameters(); ++d)
{
vector[d] = derivative[count++];
}
typename PointSetType::PointsContainer::ConstIterator ItM = movingPoints->GetPoints()->Begin();
while (ItM != movingPoints->GetPoints()->End())
{
PointType sourcePoint = ItM.Value();
PointType targetPoint = sourcePoint + vector;
for (unsigned int d = 0; d < metric->GetNumberOfParameters(); ++d)
{
moving_str1 << sourcePoint[d] << " ";
moving_str2 << targetPoint[d] << " ";
}
if (Dimension < 3)
{
moving_str1 << "0 ";
moving_str2 << "0 ";
}
moving_str1 << ItM.Index() << std::endl;
moving_str2 << ItM.Index() << std::endl;
++ItM;
}
moving_str1 << "0 0 0 0" << std::endl;
moving_str2 << "0 0 0 0" << std::endl;
return result;
}
int
itkExpectationBasedPointSetMetricTest(int, char *[])
{
int result = EXIT_SUCCESS;
if (itkExpectationBasedPointSetMetricTestRun<2>() == EXIT_FAILURE)
{
std::cerr << "Failed for Dimension 2." << std::endl;
result = EXIT_FAILURE;
}
if (itkExpectationBasedPointSetMetricTestRun<3>() == EXIT_FAILURE)
{
std::cerr << "Failed for Dimension 3." << std::endl;
result = EXIT_FAILURE;
}
return result;
}