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/*=========================================================================
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.
=========================================================================*/
/*
* This small code shows how to use the gdcm.StreamImageReader API
* to read a single (whole) frame at a time
* The API allow extracting a smaller extent of the frame of course.
* It will write out the extracted frame in /tmp/frame.raw
*
* Usage:
* $ bin/ExtractOneFrame.exe input.dcm
*/
using System;
using gdcm;
public class ExtractOneFrame
{
public static int Main(string[] args)
{
string filename = args[0];
gdcm.StreamImageReader reader = new gdcm.StreamImageReader();
reader.SetFileName( filename );
if (!reader.ReadImageInformation()) return 1;
// Get file infos
gdcm.File f = reader.GetFile();
// get some info about image
UIntArrayType extent = ImageHelper.GetDimensionsValue(f);
//System.Console.WriteLine( extent[0] );
uint dimx = extent[0];
//System.Console.WriteLine( extent[1] );
uint dimy = extent[1];
//System.Console.WriteLine( extent[2] );
uint dimz = extent[2];
PixelFormat pf = ImageHelper.GetPixelFormatValue (f);
int pixelsize = pf.GetPixelSize();
//System.Console.WriteLine( pixelsize );
// buffer to get the pixels
byte[] buffer = new byte[ dimx * dimy * pixelsize ];
for (int i = 0; i < dimz; i++)
{
// Define that I want the image 0, full size (dimx x dimy pixels)
reader.DefinePixelExtent(0, (ushort)dimx, 0, (ushort)dimy, (ushort)i, (ushort)(i+1));
uint buf_len = reader.DefineProperBufferLength(); // take into account pixel size
//System.Console.WriteLine( buf_len );
if( buf_len > buffer.Length )
{
throw new Exception("buffer is too small for target");
}
if (reader.Read(buffer, (uint)buffer.Length))
{
using (System.IO.Stream stream =
System.IO.File.Open(@"/tmp/frame.raw",
System.IO.FileMode.Create))
{
System.IO.BinaryWriter writer = new System.IO.BinaryWriter(stream);
writer.Write(buffer);
}
}
else
{
throw new Exception("can't read pixels error");
}
}
return 0;
}
}
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