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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: ImageToPointSet.cxx
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#if defined(_MSC_VER)
#pragma warning ( disable : 4786 )
#endif
// 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 -1;
}
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 -1;
}
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 0;
}
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