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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 "itkCannyEdgeDetectionImageFilter.h"
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"
#include "itkSimpleFilterWatcher.h"
#include "itkRescaleIntensityImageFilter.h"
#include "itkMath.h"
#include "itkTestingMacros.h"
int
itkCannyEdgeDetectionImageFilterTest(int argc, char * argv[])
{
if (argc < 3)
{
std::cerr << "Usage: " << itkNameOfTestExecutableMacro(argv) << " InputImage OutputImage" << std::endl;
return EXIT_FAILURE;
}
constexpr unsigned int Dimension = 2;
using InputPixelType = float;
using InputImage = itk::Image<InputPixelType, Dimension>;
using OutputPixelType = unsigned char;
using OutputImage = itk::Image<OutputPixelType, Dimension>;
using CannyEdgeDetectionImageFilterType = itk::CannyEdgeDetectionImageFilter<InputImage, InputImage>;
itk::ImageFileReader<InputImage>::Pointer reader = itk::ImageFileReader<InputImage>::New();
reader->SetFileName(argv[1]);
// Set up the filter
auto filter = CannyEdgeDetectionImageFilterType::New();
ITK_EXERCISE_BASIC_OBJECT_METHODS(filter, CannyEdgeDetectionImageFilter, ImageToImageFilter);
itk::SimpleFilterWatcher watcher(filter);
filter->SetInput(reader->GetOutput());
CannyEdgeDetectionImageFilterType::OutputImagePixelType upperThreshold = 30;
filter->SetUpperThreshold(upperThreshold);
ITK_TEST_SET_GET_VALUE(upperThreshold, filter->GetUpperThreshold());
CannyEdgeDetectionImageFilterType::OutputImagePixelType lowerThreshold = 15;
filter->SetLowerThreshold(lowerThreshold);
ITK_TEST_SET_GET_VALUE(lowerThreshold, filter->GetLowerThreshold());
CannyEdgeDetectionImageFilterType::ArrayType variance(1.0f);
filter->SetVariance(variance);
ITK_TEST_SET_GET_VALUE(variance, filter->GetVariance());
CannyEdgeDetectionImageFilterType::ArrayType maximumError(.01f);
filter->SetMaximumError(maximumError);
ITK_TEST_SET_GET_VALUE(maximumError, filter->GetMaximumError());
itk::RescaleIntensityImageFilter<InputImage, OutputImage>::Pointer rescale =
itk::RescaleIntensityImageFilter<InputImage, OutputImage>::New();
rescale->SetInput(filter->GetOutput());
rescale->SetOutputMinimum(0);
rescale->SetOutputMaximum(255);
itk::ImageFileWriter<OutputImage>::Pointer writer = itk::ImageFileWriter<OutputImage>::New();
writer->SetInput(rescale->GetOutput());
writer->SetFileName(argv[2]);
ITK_TRY_EXPECT_NO_EXCEPTION(writer->Update());
return EXIT_SUCCESS;
}
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