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/*=========================================================================
*
* Copyright Insight Software Consortium
*
* 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"
#include "itkImageFileReader.h"
#include "itkImageFileWriter.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
const unsigned int VectorDimension = 3;
typedef itk::Vector< float, VectorDimension > PixelType;
// 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
const unsigned int ImageDimension = 2;
typedef itk::Image< PixelType, ImageDimension > ImageType;
// 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
typedef itk::ImageFileReader< ImageType > ReaderType;
typedef itk::ImageFileWriter< ImageType > WriterType;
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( 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;
}
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