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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 "itkPermuteAxesImageFilter.h"
#include "itkTextOutput.h"
#include "itkCommand.h"
// The following class is used to support callbacks
// on the filter in the pipeline that follows later
class ShowProgressObject
{
public:
ShowProgressObject(itk::ProcessObject * o) { m_Process = o; }
void
ShowProgress()
{
std::cout << "Progress " << m_Process->GetProgress() << std::endl;
}
itk::ProcessObject::Pointer m_Process;
};
int
itkPermuteAxesImageFilterTest(int, char *[])
{
itk::OutputWindow::SetInstance(itk::TextOutput::New());
using PixelType = unsigned char;
enum
{
ImageDimension = 4
};
using ImageType = itk::Image<PixelType, ImageDimension>;
using PermuterType = itk::PermuteAxesImageFilter<ImageType>;
// define a small input test
ImageType::IndexType index = { { 10, 20, 30, 40 } };
ImageType::SizeType size = { { 5, 4, 3, 2 } };
ImageType::RegionType region{ index, size };
double spacing[ImageDimension] = { 1.1, 1.2, 1.3, 1.4 };
double origin[ImageDimension] = { 0.5, 0.4, 0.3, 0.2 };
auto inputImage = ImageType::New();
inputImage->SetLargestPossibleRegion(region);
inputImage->SetBufferedRegion(region);
inputImage->Allocate();
inputImage->SetSpacing(spacing);
inputImage->SetOrigin(origin);
using Iterator = itk::ImageRegionIteratorWithIndex<ImageType>;
Iterator inputIter(inputImage, inputImage->GetBufferedRegion());
PixelType counter = 0;
while (!inputIter.IsAtEnd())
{
inputIter.Set(counter);
++counter;
++inputIter;
}
// permute the image
auto permuter = PermuterType::New();
unsigned int order[ImageDimension] = { 2, 0, 3, 1 };
permuter->SetOrder(order);
permuter->SetInput(inputImage);
ShowProgressObject progressWatch(permuter);
itk::SimpleMemberCommand<ShowProgressObject>::Pointer command;
command = itk::SimpleMemberCommand<ShowProgressObject>::New();
command->SetCallbackFunction(&progressWatch, &ShowProgressObject::ShowProgress);
permuter->AddObserver(itk::ProgressEvent(), command);
permuter->Update();
permuter->GetOutput()->Print(std::cout);
permuter->Print(std::cout);
// check the output
ImageType::Pointer outputImage = permuter->GetOutput();
inputIter.GoToBegin();
bool passed = true;
while (!inputIter.IsAtEnd())
{
ImageType::IndexType inputIndex = inputIter.GetIndex();
ImageType::IndexType outputIndex;
for (int j = 0; j < ImageDimension; ++j)
{
outputIndex[j] = inputIndex[order[j]];
}
if (inputIter.Get() != outputImage->GetPixel(outputIndex))
{
passed = false;
std::cout << "Mismatch at index: " << inputIndex << std::endl;
}
auto pointdiff = inputImage->TransformIndexToPhysicalPoint<double>(inputIndex) -
outputImage->TransformIndexToPhysicalPoint<double>(outputIndex);
if (!itk::Math::FloatAlmostEqual(pointdiff.GetNorm(), 0.0))
{
passed = false;
std::cout << "Physical location mismatch at index: " << inputIndex << pointdiff.GetNorm() << std::endl;
}
++inputIter;
}
if (!passed)
{
std::cout << "Test failed." << std::endl;
return EXIT_FAILURE;
}
// exercise Get methods
std::cout << "Order: " << permuter->GetOrder() << std::endl;
std::cout << "InverseOrder: " << permuter->GetInverseOrder() << std::endl;
// test SetOrder logic - repeating indices
passed = false;
order[0] = order[1];
try
{
permuter->SetOrder(order);
}
catch (const itk::ExceptionObject & err)
{
passed = true;
std::cout << err << std::endl;
}
if (!passed)
{
std::cout << "Test failed." << std::endl;
return EXIT_FAILURE;
}
// test SetOrder logic - indices out of range
passed = false;
order[0] = ImageDimension + 2;
try
{
permuter->SetOrder(order);
}
catch (const itk::ExceptionObject & err)
{
passed = true;
std::cout << err << std::endl;
}
if (!passed)
{
std::cout << "Test failed." << std::endl;
return EXIT_FAILURE;
}
std::cout << "Test passed." << std::endl;
return EXIT_SUCCESS;
}
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