ITK  5.2.0
Insight Toolkit
Examples/IO/VectorImageReadWrite.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.
*
*=========================================================================*/
// Software Guide : BeginLatex
//
// This example illustrates how to read and write an image of pixel type
// \doxygen{Vector}.
//
// \index{itk::ImageFileRead!Vector images}
// \index{itk::ImageFileWrite!Vector images}
// \index{Vector images!Reading}
// \index{Vector images!Writing}
//
// Software Guide : EndLatex
// Software Guide : BeginLatex
//
// We should include the header files for the Image, the ImageFileReader and
// the ImageFileWriter.
//
// Software Guide : EndLatex
// Software Guide : BeginCodeSnippet
#include "itkImage.h"
// Software Guide : EndCodeSnippet
int
main(int argc, char * argv[])
{
// Verify the number of parameters in the command line
if (argc < 3)
{
std::cerr << "Usage: " << std::endl;
std::cerr << argv[0] << " inputImageFile outputImageFile " << std::endl;
return EXIT_FAILURE;
}
// Software Guide : BeginLatex
//
// Then we define the specific type of vector to be used as pixel type.
//
// Software Guide : EndLatex
// Software Guide : BeginCodeSnippet
constexpr unsigned int VectorDimension = 3;
// Software Guide : EndCodeSnippet
// Software Guide : BeginLatex
//
// We define the image dimension, and along with the pixel type we use it
// for fully instantiating the image type.
//
// Software Guide : EndLatex
// Software Guide : BeginCodeSnippet
constexpr unsigned int ImageDimension = 2;
// Software Guide : EndCodeSnippet
// Software Guide : BeginLatex
//
// Having the image type at hand, we can instantiate the reader and writer
// types, and use them for creating one object of each type.
//
// Software Guide : EndLatex
// Software Guide : BeginCodeSnippet
using ReaderType = itk::ImageFileReader<ImageType>;
using WriterType = itk::ImageFileWriter<ImageType>;
ReaderType::Pointer reader = ReaderType::New();
WriterType::Pointer writer = WriterType::New();
// Software Guide : EndCodeSnippet
// Software Guide : BeginLatex
//
// A filename must be provided to both the reader and the writer. In this
// particular case we take those filenames from the command line arguments.
//
// Software Guide : EndLatex
// Software Guide : BeginCodeSnippet
reader->SetFileName(argv[1]);
writer->SetFileName(argv[2]);
// Software Guide : EndCodeSnippet
// Software Guide : BeginLatex
//
// This being a minimal example, we create a short pipeline where we simply
// connect the output of the reader to the input of the writer.
//
// Software Guide : EndLatex
// Software Guide : BeginCodeSnippet
writer->SetInput(reader->GetOutput());
// Software Guide : EndCodeSnippet
// Software Guide : BeginLatex
//
// The execution of this short pipeline is triggered by invoking the
// writer's \code{Update()} method. This invocation must be placed inside a
// \code{try/catch} block since its execution may result in exceptions being
// thrown.
//
// Software Guide : EndLatex
// Software Guide : BeginCodeSnippet
try
{
writer->Update();
}
catch (const itk::ExceptionObject & err)
{
std::cerr << "ExceptionObject caught !" << std::endl;
std::cerr << err << std::endl;
return EXIT_FAILURE;
}
// Software Guide : EndCodeSnippet
// Software Guide : BeginLatex
//
// Of course, you could envision the addition of filters in between the
// reader and the writer. Those filters could perform operations on the
// vector image.
//
// Software Guide : EndLatex
return EXIT_SUCCESS;
}
itk::Vector
A templated class holding a n-Dimensional vector.
Definition: itkVector.h:62
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