# MergeFile.py

    ############################################################################
    #
    #  Program: GDCM (Grassroots DICOM). A DICOM library
    #  Module:  $URL$
    #
    #  Copyright (c) 2006-2010 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.
    #
    ############################################################################

    """
    Usage:

     python MergeFile.py input1.dcm input2.dcm

      It will produce a 'merge.dcm' output file, which contains all meta information from input1.dcm
      and copy the Stored Pixel values from input2.dcm
      This script even works when input2.dcm is a Secondary Capture and does not contains information
      such as IOP and IPP...
    """

    import sys
    import gdcm

    if __name__ == "__main__":

      file1 = sys.argv[1]
      file2 = sys.argv[2]

      r1 = gdcm.ImageReader()
      r1.SetFileName( file1 )
      if not r1.Read():
        sys.exit(1)

      r2 = gdcm.ImageReader()
      r2.SetFileName( file2 )
      if not r2.Read():
        sys.exit(1)

      # Image from r2 could be Secondary Capture and thus would not contains neither IPP nor IOP
      # Instead always prefer to only copy the Raw Data Element.
      # Warning ! Image need to be identical ! Only the value of Stored Pixel can be different.
      r1.GetImage().SetDataElement( r2.GetImage().GetDataElement() )

      w = gdcm.ImageWriter()
      w.SetFile( r1.GetFile() )
      #w.SetImage( r2.GetImage() )  # See comment above
      w.SetImage( r1.GetImage() )

      w.SetFileName( "merge.dcm" )
      if not w.Write():
        sys.exit(1)

      sys.exit(0)