ITK  5.2.0
Insight Toolkit
SphinxExamples/src/Filtering/ImageGradient/ComputeGradientMagnitude/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[])
{
// Verify command line arguments
if (argc != 3)
{
std::cerr << "Usage: " << std::endl;
std::cerr << argv[0] << " <InputImage> <OutputImage" << std::endl;
return EXIT_FAILURE;
}
const char * inputFileName = argv[1];
const char * outputFileName = argv[2];
constexpr unsigned int Dimension = 2;
using InputPixelType = unsigned char;
using InputImageType = itk::Image<InputPixelType, Dimension>;
using OutputPixelType = float;
using OutputImageType = itk::Image<OutputPixelType, Dimension>;
// Create and setup a reader
ReaderType::Pointer reader = ReaderType::New();
reader->SetFileName(inputFileName);
// Create and setup a gradient filter
FilterType::Pointer gradientFilter = FilterType::New();
gradientFilter->SetInput(reader->GetOutput());
WriterType::Pointer writer = WriterType::New();
writer->SetFileName(outputFileName);
writer->SetInput(gradientFilter->GetOutput());
try
{
writer->Update();
}
catch (itk::ExceptionObject & error)
{
std::cerr << "Error: " << error << std::endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
itk::GradientMagnitudeImageFilter
Computes the gradient magnitude of an image region at each pixel.
Definition: itkGradientMagnitudeImageFilter.h:42
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
itkImageFileWriter.h
itk::Image
Templated n-dimensional image class.
Definition: itkImage.h:86
itk::GTest::TypedefsAndConstructors::Dimension2::Dimension
constexpr unsigned int Dimension
Definition: itkGTestTypedefsAndConstructors.h:44
itkGradientMagnitudeImageFilter.h