GDCM 2.2.1

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CompressLossyJPEG.cs
/*=========================================================================
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.
=========================================================================*/
/*
* Usage:
* $ export LD_LIBRARY_PATH=$HOME/Perso/gdcm/debug-gcc/bin
* $ mono bin/CompressLossyJPEG.exe input.dcm output.dcm
*/
using System;
using gdcm;
public class CompressLossyJPEG
{
public static int Main(string[] args)
{
if( args.Length < 2 )
{
System.Console.WriteLine( " input.dcm output.dcm" );
return 1;
}
string filename = args[0];
string outfilename = args[1];
ImageReader reader = new ImageReader();
reader.SetFileName( filename );
if( !reader.Read() )
{
System.Console.WriteLine( "Could not read: " + filename );
return 1;
}
// The output of gdcm::Reader is a gdcm::File
File file = reader.GetFile();
// the dataset is the the set of element we are interested in:
DataSet ds = file.GetDataSet();
Image image = reader.GetImage();
//image.Print( cout );
ImageChangeTransferSyntax change = new ImageChangeTransferSyntax();
TransferSyntax targetts = new TransferSyntax( TransferSyntax.TSType.JPEGBaselineProcess1 );
change.SetTransferSyntax( targetts );
// Setup our JPEGCodec, warning it should be compatible with JPEGBaselineProcess1
JPEGCodec jpegcodec = new JPEGCodec();
if( !jpegcodec.CanCode( targetts ) )
{
System.Console.WriteLine( "Something went really wrong, JPEGCodec cannot handle JPEGBaselineProcess1" );
return 1;
}
jpegcodec.SetLossless( false );
jpegcodec.SetQuality( 50 ); // poor quality !
change.SetUserCodec( jpegcodec ); // specify the codec to use to the ImageChangeTransferSyntax
change.SetInput( image );
bool b = change.Change();
if( !b )
{
System.Console.WriteLine( "Could not change the Transfer Syntax" );
return 1;
}
ImageWriter writer = new ImageWriter();
writer.SetImage( (gdcm.Image)change.GetOutput() );
writer.SetFile( reader.GetFile() );
writer.SetFileName( outfilename );
if( !writer.Write() )
{
System.Console.WriteLine( "Could not write: " + outfilename );
return 1;
}
return 0;
}
}