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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 "itkSignedMaurerDistanceMapImageFilter.h"
#include "itkStdStreamStateSave.h"
int
itkSignedMaurerDistanceMapImageFilterTest11(int, char *[])
{
// Save the format stream variables for std::cout
// They will be restored when coutState goes out of scope
itk::StdStreamStateSave coutState(std::cout);
std::cout << "Test ITK Liza Signed Maurer Distance Map" << std::endl << std::endl;
std::cout << "Compute the distance map of a 5x5 image" << std::endl;
std::cout << "with a point at (4,4) (value=1)" << std::endl << std::endl;
using myImageType2D1 = itk::Image<unsigned char, 2>;
using myImageType2D2 = itk::Image<float, 2>;
/* Allocate the 2D image */
myImageType2D1::SizeType size2D = { { 5, 5 } };
myImageType2D1::IndexType index2D = { { 0, 0 } };
myImageType2D1::RegionType region2D;
region2D.SetSize(size2D);
region2D.SetIndex(index2D);
auto inputImage2D = myImageType2D1::New();
inputImage2D->SetRegions(region2D);
inputImage2D->AllocateInitialized();
/* Set pixel (4,4) with the value 1
* The SignedMaurer Distance is performed for each pixel with a value > 0
* The ClosestPoints computation is based on the value of the pixel.
*/
index2D[0] = 3;
index2D[1] = 3;
inputImage2D->SetPixel(index2D, 1);
/* Create SignedMaurerDistance Map filter */
using myFilterType2D = itk::SignedMaurerDistanceMapImageFilter<myImageType2D1, myImageType2D2>;
auto filter2D = myFilterType2D::New();
filter2D->SetInput(inputImage2D);
myImageType2D2::Pointer outputDistance2D = filter2D->GetOutput();
filter2D->Update();
ShowDistanceMap(outputDistance2D);
/* Test Squared Distance functionality */
// Get the value of pixel at location [0,0] before distance is squared
myImageType2D2::IndexType index;
index[0] = 0;
index[1] = 0;
std::cout << "here" << std::endl;
const double distance1 = outputDistance2D->GetPixel(index);
std::cout << "distance1: " << distance1 << std::endl;
filter2D->SquaredDistanceOn();
// filter2D->SquaredDistanceOff();
if (filter2D->GetSquaredDistance() != true)
{
std::cerr << "filter2D->GetSquaredDistance() != true" << std::endl;
return EXIT_FAILURE;
}
// filter2D->SetSquaredDistance( true );
filter2D->Update();
const double distance2 = outputDistance2D->GetPixel(index);
std::cout << "distance2: " << distance2 << std::endl;
const myImageType2D2::PixelType epsilon = 1e-5;
if (itk::Math::abs(distance2 - distance1 * distance1) > epsilon)
{
std::cerr << "Error in use of the SetSquaredDistance() method" << std::endl;
return EXIT_FAILURE;
}
std::cout << "Squared Distance Map " << std::endl;
ShowDistanceMap(outputDistance2D);
/* Test for images with anisotropic spacing */
myImageType2D1::SpacingType anisotropicSpacing;
anisotropicSpacing[0] = 1.0;
anisotropicSpacing[1] = 5.0;
inputImage2D->SetSpacing(anisotropicSpacing);
inputImage2D->FillBuffer(0);
index2D[0] = 2;
index2D[1] = 2;
inputImage2D->SetPixel(index2D, 1);
filter2D->SetInput(inputImage2D);
filter2D->UseImageSpacingOn();
filter2D->SquaredDistanceOff();
filter2D->InsideIsPositiveOn();
filter2D->SetBackgroundValue(0);
if (filter2D->GetUseImageSpacing() != true)
{
std::cerr << "filter2D->GetUseImageSpacing() != true" << std::endl;
return EXIT_FAILURE;
}
if (filter2D->GetInsideIsPositive() != true)
{
std::cerr << "filter2D->GetInsideIsPositive() != true" << std::endl;
return EXIT_FAILURE;
}
if (filter2D->GetBackgroundValue() != 0)
{
std::cerr << "filter2D->GetBackgroundValue() != 0" << std::endl;
return EXIT_FAILURE;
}
if (filter2D->GetSquaredDistance())
{
std::cerr << "filter2D->GetSquaredDistance() == true and it should not be" << std::endl;
return EXIT_FAILURE;
}
filter2D->SetUseImageSpacing(true);
myImageType2D2::Pointer outputDistance2D2 = filter2D->GetOutput();
filter2D->Update();
/* Show ImageSpacing Distance map */
std::cout << "Use ImageSpacing Distance Map with squared distance turned off" << std::endl;
ShowDistanceMap(outputDistance2D2);
return EXIT_SUCCESS;
}
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