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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 "itkShowDistanceMap.h"
#include "itkSignedDanielssonDistanceMapImageFilter.h"
#include "itkStdStreamStateSave.h"
void
test(int);
int
itkSignedDanielssonDistanceMapImageFilterTest(int, char *[])
{
test(1); // Test with a 9x9 square, with a 5x5 subsquare in the middle ON
test(0); // Test with 2 points.. same test and results as
// DanielssonDistanceMap
return EXIT_SUCCESS;
}
void
test(int testIdx)
{
// Save the format stream variables for std::cout
// They will be restored when coutState goes out of scope
// scope.
itk::StdStreamStateSave coutState(std::cout);
constexpr unsigned int Dimension = 2;
using PixelType = float;
using myImageType2D1 = itk::Image<unsigned char, Dimension>;
using myImageType2D2 = itk::Image<PixelType, Dimension>;
/* TEST 1: For a point image, SignedDaniessonDistanceMapImageFilter should
* give the same output as DaniessonDistanceMapImageFilter */
/* Allocate the 2D image */
myImageType2D1::SizeType size2D;
size2D.Fill(9);
myImageType2D1::IndexType index2D;
index2D.Fill(0);
myImageType2D1::RegionType region2D{ index2D, size2D };
auto inputImage2D = myImageType2D1::New();
inputImage2D->SetRegions(region2D);
inputImage2D->AllocateInitialized();
if (!testIdx)
{
std::cout << "Compute with a 9x9 image, pixels (4,4) and (1,6) set to ON."
<< " This subtest is the same as the DanielssonDistanceMapTest "
<< "and should yield the same results." << std::endl
<< std::endl;
/* Set pixel (4,4) with the value 1
* and pixel (1,6) with the value 2
* The Danielsson Distance is performed for each pixel with a value > 0
* The ClosestPoints computation is based on the value of the pixel.
* Test 1 contains two isolated points and should return the same result
* as if the filter SignedDanielssonDistanceMapImageFilter was changed
* to DanielssonDistanceMapImageFilter
*/
index2D[0] = 4;
index2D[1] = 4;
inputImage2D->SetPixel(index2D, 1);
index2D[0] = 1;
index2D[1] = 6;
inputImage2D->SetPixel(index2D, 2);
}
else
{
std::cout << "Compute with a 9x9 image, with a 5x5 square at the center set to ON." << std::endl << std::endl;
// Test the signed Danielsson Output for the a 5x5 square in a 9x9 image
int i, j;
for (i = 2; i <= 6; ++i)
{
for (j = 2; j <= 6; ++j)
{
index2D[0] = i;
index2D[1] = j;
inputImage2D->SetPixel(index2D, 1);
}
}
}
/* Create Danielsson Distance Map filter */
using myFilterType2D = itk::SignedDanielssonDistanceMapImageFilter<myImageType2D1, myImageType2D2>;
auto filter2D = myFilterType2D::New();
filter2D->SetInput(inputImage2D);
myImageType2D2::Pointer outputDistance2D = filter2D->GetOutput();
using VoronoiImageType = myFilterType2D::VoronoiImageType;
VoronoiImageType::Pointer outputVoronoi2D = filter2D->GetVoronoiMap();
myFilterType2D::VectorImageType::Pointer outputComponents = filter2D->GetVectorDistanceMap();
filter2D->Update();
ShowDistanceMap(outputDistance2D);
std::cout << std::endl << std::endl;
std::cout << "Voronoi Map Image 2D" << std::endl << std::endl;
ShowDistanceMap(outputVoronoi2D);
/* Show VectorsComponents Points map */
std::cout << std::endl << std::endl;
std::cout << "Components Map Image 2D" << std::endl << std::endl;
itk::ImageSliceConstIteratorWithIndex<myFilterType2D::VectorImageType> it2D4(outputComponents,
outputComponents->GetRequestedRegion());
it2D4.SetFirstDirection(0);
it2D4.SetSecondDirection(1);
while (!it2D4.IsAtEnd())
{
while (!it2D4.IsAtEndOfSlice())
{
while (!it2D4.IsAtEndOfLine())
{
std::cout << '[';
for (unsigned int i = 0; i < 2; ++i)
{
std::cout << it2D4.Get()[i];
if (i == 0)
{
std::cout << ',';
}
}
std::cout << ']';
std::cout << '\t';
++it2D4;
}
std::cout << std::endl;
it2D4.NextLine();
}
it2D4.NextSlice();
}
/* Test Distance functionality */
filter2D->Update();
std::cout << "Distance Map " << std::endl;
ShowDistanceMap(outputDistance2D);
}
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