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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 convert an ITK Image into a PointSet.
//
// Software Guide : EndLatex
// Software Guide : BeginCodeSnippet
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"
#include "itkImage.h"
#include "itkPointSet.h"
#include "itkImageRegionConstIterator.h"
int main( int argc, char * argv[] )
{
// Verify the number of parameters in the command line
if( argc < 2 )
{
std::cerr << "Usage: " << std::endl;
std::cerr << argv[0] << " inputImageFile " << std::endl;
return EXIT_FAILURE;
}
typedef unsigned char PixelType;
const unsigned int Dimension = 2;
typedef itk::Image< PixelType, Dimension > ImageType;
typedef itk::PointSet< PixelType, Dimension > PointSetType;
typedef itk::ImageFileReader< ImageType > ReaderType;
ReaderType::Pointer reader = ReaderType::New();
const char * inputFilename = argv[1];
reader->SetFileName( inputFilename );
try
{
reader->Update();
}
catch( itk::ExceptionObject & err )
{
std::cout << "ExceptionObject caught !" << std::endl;
std::cout << err << std::endl;
return EXIT_FAILURE;
}
PointSetType::Pointer pointSet = PointSetType::New();
typedef itk::ImageRegionConstIterator< ImageType > IteratorType;
const ImageType * image = reader->GetOutput();
IteratorType it( image, image->GetBufferedRegion() );
it.GoToBegin();
typedef PointSetType::PointType PointType;
PointType point;
unsigned long pointId = 0;
while( !it.IsAtEnd() )
{
// Convert the pixel position into a Point
image->TransformIndexToPhysicalPoint( it.GetIndex() , point );
pointSet->SetPoint( pointId, point );
// Transfer the pixel data to the value associated with the point.
pointSet->SetPointData( pointId, it.Get() );
++it;
++pointId;
}
std::cout << "Number Of Points = ";
std::cout << pointSet->GetNumberOfPoints() << std::endl;
// Software Guide : EndCodeSnippet
return EXIT_SUCCESS;
}
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