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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 <iostream>
#include "itkVectorImageToImageAdaptor.h"
#include "itkImageRegionIteratorWithIndex.h"
#include "itkTestingMacros.h"
#include "itkMath.h"
// This test tests the basic functionality of
// VectorImageToImageAdaptor, especially the Set/GetPixel() methods.
int
itkVectorImageToImageAdaptorTest(int, char *[])
{
// image type alias
constexpr unsigned int Dimension = 3;
constexpr unsigned int VectorLength = 4;
constexpr unsigned int componentToExtract = 3;
using PixelType = float;
using VectorImageType = itk::VectorImage<PixelType, Dimension>;
using VectorImageToImageAdaptorType = itk::VectorImageToImageAdaptor<PixelType, Dimension>;
// initialize a vector image
auto vectorImage = VectorImageType::New();
VectorImageType::IndexType start;
itk::VariableLengthVector<PixelType> f(VectorLength);
VectorImageType::SizeType size;
for (unsigned int i = 0; i < VectorLength; ++i)
{
f[i] = PixelType(i);
}
start.Fill(0);
size.Fill(50);
VectorImageType::RegionType region{ start, size };
vectorImage->SetVectorLength(VectorLength);
vectorImage->SetRegions(region);
vectorImage->Allocate();
vectorImage->FillBuffer(f);
// run the adaptor
auto vectorImageToImageAdaptor = VectorImageToImageAdaptorType::New();
ITK_EXERCISE_BASIC_OBJECT_METHODS(vectorImageToImageAdaptor, VectorImageToImageAdaptor, ImageAdaptor);
vectorImageToImageAdaptor->SetExtractComponentIndex(componentToExtract);
vectorImageToImageAdaptor->SetImage(vectorImage);
vectorImageToImageAdaptor->Update();
// test adaptor with const iterator
itk::ImageRegionConstIteratorWithIndex<VectorImageToImageAdaptorType> adaptIt(vectorImageToImageAdaptor, region);
adaptIt.GoToBegin();
while (!adaptIt.IsAtEnd())
{
PixelType pixelV = adaptIt.Get();
if (itk::Math::NotAlmostEquals(pixelV, PixelType(componentToExtract)))
{
std::cout << "Wrong Pixel Value: adaptIt(" << adaptIt.GetIndex() << ") = " << adaptIt.Get() << std::endl;
return EXIT_FAILURE;
}
++adaptIt;
}
// test Get/SetPixel() methods
VectorImageToImageAdaptorType::IndexType index;
index.Fill(10);
ITK_TEST_EXPECT_EQUAL(PixelType(componentToExtract), vectorImageToImageAdaptor->GetPixel(index));
PixelType v = 4.4f;
vectorImageToImageAdaptor->SetPixel(index, v);
ITK_TEST_EXPECT_EQUAL(v, vectorImageToImageAdaptor->GetPixel(index));
return EXIT_SUCCESS;
}
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