GDCM 2.2.1

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Convert16BitsTo8Bits.cxx
/*=========================================================================
Program: GDCM (Grassroots DICOM). A DICOM library
Copyright (c) 2006-2011 Mathieu Malaterre
All rights reserved.
See Copyright.txt or http://gdcm.sourceforge.net/Copyright.html 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 notice for more information.
=========================================================================*/
#include "vtkGDCMImageReader.h"
#include "vtkGDCMImageWriter.h"
#include "vtkImageData.h"
#include "vtkImageCast.h"
#include "gdcmTesting.h"
// The following file is 16/16/15 but the scalar range of the image is [0,192]
// it could be safely stored as 8bits instead:
// gdcmData/012345.002.050.dcm
int main(int, char *[])
{
const char *directory = gdcm::Testing::GetDataRoot();
if(!directory) return 1;
std::string file = std::string(directory) + "/012345.002.050.dcm";
std::cout << file << std::endl;
vtkGDCMImageReader *reader = vtkGDCMImageReader::New();
reader->SetFileName( file.c_str() );
reader->Update();
//reader->GetOutput()->Print( std::cout );
vtkImageCast *cast = vtkImageCast::New();
cast->SetInput( reader->GetOutput() );
cast->SetOutputScalarTypeToUnsignedChar();
vtkGDCMImageWriter *writer = vtkGDCMImageWriter::New();
writer->SetFileName( "/tmp/cast.dcm" );
writer->SetInput( cast->GetOutput() );
writer->SetImageFormat( reader->GetImageFormat() );
writer->SetMedicalImageProperties( reader->GetMedicalImageProperties() );
writer->SetDirectionCosines( reader->GetDirectionCosines() );
writer->SetShift( reader->GetShift() );
writer->SetScale( reader->GetScale() );
writer->Write();
reader->Delete();
cast->Delete();
writer->Delete();
return 0;
}