ITK  5.2.0
Insight Toolkit
SphinxExamples/src/Filtering/ImageFeature/DetectEdgesWithCannyFilter/Code.cxx
/*=========================================================================
*
* 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
*
* http://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 "itkImage.h"
int
main(int argc, char * argv[])
{
if (argc != 6)
{
std::cerr << "Usage: " << std::endl;
std::cerr << argv[0];
std::cerr << "<InputImage> <OutputImage> ";
std::cerr << "<Variance> <LowerThreshold> <UpperThreshold>";
std::cerr << std::endl;
return EXIT_FAILURE;
}
constexpr unsigned int Dimension = 2;
using InputPixelType = float;
using OutputPixelType = unsigned char;
const char * inputImage = argv[1];
const char * outputImage = argv[2];
const InputPixelType variance = std::stod(argv[3]);
const InputPixelType lowerThreshold = std::stod(argv[4]);
const InputPixelType upperThreshold = std::stod(argv[5]);
using InputImageType = itk::Image<InputPixelType, Dimension>;
using OutputImageType = itk::Image<OutputPixelType, Dimension>;
ReaderType::Pointer reader = ReaderType::New();
reader->SetFileName(inputImage);
FilterType::Pointer filter = FilterType::New();
filter->SetInput(reader->GetOutput());
filter->SetVariance(variance);
filter->SetLowerThreshold(lowerThreshold);
filter->SetUpperThreshold(upperThreshold);
RescaleType::Pointer rescaler = RescaleType::New();
rescaler->SetInput(filter->GetOutput());
rescaler->SetOutputMinimum(0);
rescaler->SetOutputMaximum(255);
WriterType::Pointer writer = WriterType::New();
writer->SetFileName(outputImage);
writer->SetInput(rescaler->GetOutput());
try
{
writer->Update();
}
catch (itk::ExceptionObject & e)
{
std::cerr << "Error: " << e << std::endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
itkCannyEdgeDetectionImageFilter.h
itkImageFileReader.h
itkImage.h
itk::ImageFileReader
Data source that reads image data from a single file.
Definition: itkImageFileReader.h:75
itk::ImageFileWriter
Writes image data to a single file.
Definition: itkImageFileWriter.h:87
itk::CannyEdgeDetectionImageFilter
This filter is an implementation of a Canny edge detector for scalar-valued images.
Definition: itkCannyEdgeDetectionImageFilter.h:88
itkRescaleIntensityImageFilter.h
itkImageFileWriter.h
itk::RescaleIntensityImageFilter
Applies a linear transformation to the intensity levels of the input Image.
Definition: itkRescaleIntensityImageFilter.h:154
itk::Math::e
static constexpr double e
Definition: itkMath.h:54
itk::Image
Templated n-dimensional image class.
Definition: itkImage.h:86
itk::GTest::TypedefsAndConstructors::Dimension2::Dimension
constexpr unsigned int Dimension
Definition: itkGTestTypedefsAndConstructors.h:44