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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
*
* https://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 "itkFastMarchingImageFilterBase.h"
#include "itkFastMarchingNumberOfElementsStoppingCriterion.h"
#include "itkBinaryThresholdImageFilter.h"
#include "itkImageRegionConstIterator.h"
#include "itkTestingMacros.h"
int
itkFastMarchingImageFilterRealWithNumberOfElementsTest(int, char *[])
{
// create a fastmarching object
using PixelType = float;
constexpr unsigned int Dimension = 2;
using FloatImageType = itk::Image<PixelType, Dimension>;
using CriterionType = itk::FastMarchingNumberOfElementsStoppingCriterion<FloatImageType, FloatImageType>;
using FastMarchingType = itk::FastMarchingImageFilterBase<FloatImageType, FloatImageType>;
auto criterion = CriterionType::New();
criterion->SetTargetNumberOfElements(100);
auto marcher = FastMarchingType::New();
marcher->SetStoppingCriterion(criterion);
using NodePairType = FastMarchingType::NodePairType;
// using NodeContainerType = FastMarchingType::NodeContainerType;
using NodePairContainerType = FastMarchingType::NodePairContainerType;
// setup alive points
auto alive = NodePairContainerType::New();
NodePairType node_pair;
FloatImageType::OffsetType offset0 = { { 28, 35 } };
itk::Index<2> index;
index.Fill(0);
node_pair.SetValue(0.0);
node_pair.SetNode(index + offset0);
alive->push_back(node_pair);
node_pair.SetValue(42.0);
index.Fill(200);
node_pair.SetNode(index); // this node is out of range
alive->push_back(node_pair);
marcher->SetAlivePoints(alive);
// setup trial points
auto trial = NodePairContainerType::New();
node_pair.SetValue(1.0);
index.Fill(0);
index += offset0;
index[0] += 1;
node_pair.SetNode(index);
trial->push_back(node_pair);
index[0] -= 1;
index[1] += 1;
node_pair.SetNode(index);
trial->push_back(node_pair);
index[0] -= 1;
index[1] -= 1;
node_pair.SetNode(index);
trial->push_back(node_pair);
index[0] += 1;
index[1] -= 1;
node_pair.SetNode(index);
trial->push_back(node_pair);
node_pair.SetValue(42.0);
index.Fill(300); // this node is out of range
node_pair.SetNode(index);
trial->push_back(node_pair);
marcher->SetTrialPoints(trial);
// specify the size of the output image
FloatImageType::SizeType size = { { 64, 64 } };
marcher->SetOutputSize(size);
// setup a speed image of ones
auto speedImage = FloatImageType::New();
FloatImageType::RegionType region;
region.SetSize(size);
speedImage->SetLargestPossibleRegion(region);
speedImage->SetBufferedRegion(region);
speedImage->Allocate();
itk::ImageRegionIterator<FloatImageType> speedIter(speedImage, speedImage->GetBufferedRegion());
while (!speedIter.IsAtEnd())
{
speedIter.Set(1.0);
++speedIter;
}
marcher->SetInput(speedImage);
ITK_TRY_EXPECT_NO_EXCEPTION(marcher->Update());
using OutputPixelType = char;
using OutputImageType = itk::Image<OutputPixelType, Dimension>;
using ThresholdingFilterType = itk::BinaryThresholdImageFilter<FloatImageType, OutputImageType>;
auto thresholder = ThresholdingFilterType::New();
thresholder->SetLowerThreshold(0.0);
thresholder->SetUpperThreshold(100.0);
thresholder->SetOutsideValue(0);
thresholder->SetInsideValue(1);
thresholder->SetInput(marcher->GetOutput());
ITK_TRY_EXPECT_NO_EXCEPTION(thresholder->Update());
OutputImageType::Pointer output = thresholder->GetOutput();
using OutputIteratorType = itk::ImageRegionConstIterator<OutputImageType>;
OutputIteratorType it(output, output->GetLargestPossibleRegion());
it.GoToBegin();
unsigned int counter = 0;
while (!it.IsAtEnd())
{
if (it.Get() == 1)
{
++counter;
}
++it;
}
if (counter >= 100)
{
return EXIT_SUCCESS;
}
else
{
return EXIT_FAILURE;
}
}
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