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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 "itkMinimumMaximumImageCalculator.h"
#include "itkObject.h"
#include "itkTestingMacros.h"
int
itkMinimumMaximumImageCalculatorTest(int, char *[])
{
using SizeType = itk::Size<3>;
using ImageType = itk::Image<short, 3>;
using MinMaxCalculatorType = itk::MinimumMaximumImageCalculator<ImageType>;
/* Define the image size and physical coordinates */
SizeType size = { { 20, 20, 20 } };
double origin[3] = { 0.0, 0.0, 0.0 };
double spacing[3] = { 1, 1, 1 };
std::cout << "Testing Minimum and Maximum Image Calulator:\n";
// Allocate a simple test image
auto image = ImageType::New();
ImageType::RegionType region;
region.SetSize(size);
image->SetRegions(region);
image->Allocate();
// Set origin and spacing of physical coordinates
image->SetOrigin(origin);
image->SetSpacing(spacing);
short minimum = -52;
short maximum = 103;
// Initialize the image contents with the minimum value
itk::Index<3> index;
for (int slice = 0; slice < 20; ++slice)
{
index[2] = slice;
for (int row = 0; row < 20; ++row)
{
index[1] = row;
for (int col = 0; col < 20; ++col)
{
index[0] = col;
image->SetPixel(index, minimum);
}
}
}
// The minimum intensity index position will contain a single value:
// since all pixels have equal value, it will be the first pixel
itk::Index<3> minIntensityValueIndex;
minIntensityValueIndex[0] = 0;
minIntensityValueIndex[1] = 0;
minIntensityValueIndex[2] = 0;
// Set voxel (10,10,10) to maximum value
itk::Index<3> maxIntensityValueIndex;
maxIntensityValueIndex[0] = 10;
maxIntensityValueIndex[1] = 10;
maxIntensityValueIndex[2] = 10;
image->SetPixel(maxIntensityValueIndex, maximum);
// Create and initialize the calculator
auto calculator = MinMaxCalculatorType::New();
ITK_EXERCISE_BASIC_OBJECT_METHODS(calculator, MinimumMaximumImageCalculator, Object);
calculator->SetImage(image);
calculator->Compute();
// Test minimum of intensity
ITK_TEST_SET_GET_VALUE(minimum, calculator->GetMinimum());
ITK_TEST_SET_GET_VALUE(minIntensityValueIndex, calculator->GetIndexOfMinimum());
// Test maximum of intensity
ITK_TEST_SET_GET_VALUE(maximum, calculator->GetMaximum());
ITK_TEST_SET_GET_VALUE(maxIntensityValueIndex, calculator->GetIndexOfMaximum());
// Set the region over which perform the computations
itk::Size<3> regionSize = { { 4, 4, 4 } };
itk::Index<3> idx = { { 0, 0, 0 } };
MinMaxCalculatorType::RegionType computationRegion{ idx, regionSize };
calculator->SetRegion(computationRegion);
minimum = -102;
maximum = 800;
// Set an index inside the region set
maxIntensityValueIndex[0] = 2;
maxIntensityValueIndex[1] = 2;
maxIntensityValueIndex[2] = 2;
image->SetPixel(minIntensityValueIndex, minimum);
image->SetPixel(maxIntensityValueIndex, maximum);
calculator->SetImage(image);
calculator->ComputeMinimum();
// Test minimum of intensity
ITK_TEST_SET_GET_VALUE(minimum, calculator->GetMinimum());
ITK_TEST_SET_GET_VALUE(minIntensityValueIndex, calculator->GetIndexOfMinimum());
calculator->ComputeMaximum();
// Test maximum of intensity
ITK_TEST_SET_GET_VALUE(maximum, calculator->GetMaximum());
ITK_TEST_SET_GET_VALUE(maxIntensityValueIndex, calculator->GetIndexOfMaximum());
return EXIT_SUCCESS;
}
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