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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 "itkOtsuThresholdImageFilter.h"
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"
#include "itkSimpleFilterWatcher.h"
#include "itkTestingMacros.h"
int
itkOtsuThresholdImageFilterTest(int argc, char * argv[])
{
if (argc < 6)
{
std::cerr << "Missing parameters." << std::endl;
std::cerr << "Usage:" << std::endl;
std::cerr << itkNameOfTestExecutableMacro(argv) << " inputImageFile"
<< " outputImageFile"
<< " numberOfHistogramBins"
<< " autoMinimumMaximum"
<< " expectedThreshold"
<< " [flipOutputIntensities]"
<< " [returnBinMidpoint]" << std::endl;
return EXIT_FAILURE;
}
constexpr unsigned int Dimension = 2;
using InputPixelType = short;
using OutputPixelType = unsigned char;
using InputImageType = itk::Image<InputPixelType, Dimension>;
using OutputImageType = itk::Image<OutputPixelType, Dimension>;
using ReaderType = itk::ImageFileReader<InputImageType>;
auto reader = ReaderType::New();
reader->SetFileName(argv[1]);
ITK_TRY_EXPECT_NO_EXCEPTION(reader->Update());
using FilterType = itk::OtsuThresholdImageFilter<InputImageType, OutputImageType>;
auto filter = FilterType::New();
itk::SimpleFilterWatcher watcher(filter);
ITK_EXERCISE_BASIC_OBJECT_METHODS(filter, OtsuThresholdImageFilter, HistogramThresholdImageFilter);
#if defined(ITKV4_COMPATIBILITY)
ITK_TEST_EXPECT_TRUE(filter->GetReturnBinMidpoint());
#else
ITK_TEST_EXPECT_TRUE(!filter->GetReturnBinMidpoint());
#endif
auto numberOfHistogramBins = static_cast<itk::SizeValueType>(std::stoi(argv[3]));
filter->SetNumberOfHistogramBins(numberOfHistogramBins);
ITK_TEST_SET_GET_VALUE(numberOfHistogramBins, filter->GetNumberOfHistogramBins());
auto autoMinimumMaximum = static_cast<bool>(std::stoi(argv[4]));
ITK_TEST_SET_GET_BOOLEAN(filter, AutoMinimumMaximum, autoMinimumMaximum);
// Test no histogram exception (no input set)
ITK_TRY_EXPECT_EXCEPTION(filter->Update());
FilterType::CalculatorType::Pointer calculator = FilterType::CalculatorType::New();
filter->SetCalculator(calculator);
ITK_TEST_SET_GET_VALUE(calculator, filter->GetCalculator());
filter->SetInput(reader->GetOutput());
if (argc > 5)
{
bool flipOutputIntensities = std::stoi(argv[6]);
if (flipOutputIntensities)
{
// Flip the inside and outside values
FilterType::OutputPixelType outsideValue = filter->GetInsideValue();
FilterType::OutputPixelType insideValue = filter->GetOutsideValue();
filter->SetInsideValue(insideValue);
filter->SetOutsideValue(outsideValue);
}
}
if (argc > 6)
{
bool returnBinMidpoint = static_cast<bool>(std::stoi(argv[6]));
ITK_TEST_SET_GET_BOOLEAN(filter, ReturnBinMidpoint, returnBinMidpoint);
}
ITK_TRY_EXPECT_NO_EXCEPTION(filter->Update());
// Regression test: compare computed threshold
auto expectedThreshold = static_cast<FilterType::InputPixelType>(std::stod(argv[5]));
FilterType::InputPixelType resultThreshold = filter->GetThreshold();
if (itk::Math::NotAlmostEquals(expectedThreshold, resultThreshold))
{
std::cerr << "Test failed!" << std::endl;
std::cerr << "Error in GetThreshold()" << std::endl;
std::cerr << "Expected: " << itk::NumericTraits<FilterType::InputPixelType>::PrintType(expectedThreshold)
<< ", but got: " << itk::NumericTraits<FilterType::InputPixelType>::PrintType(resultThreshold)
<< std::endl;
return EXIT_FAILURE;
}
// Write output image
using WriterType = itk::ImageFileWriter<OutputImageType>;
auto writer = WriterType::New();
writer->SetInput(filter->GetOutput());
writer->SetFileName(argv[2]);
ITK_TRY_EXPECT_NO_EXCEPTION(writer->Update());
std::cout << "Test finished" << std::endl;
return EXIT_SUCCESS;
}
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