GDCM: ExtractOneFrame.cs

GDCM 3.2.11

ExtractOneFrame.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.
=========================================================================*/
/*
* 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;
}
}
gdcm::Exception
Exception.
Definition gdcmException.h:46
gdcm::File
a DICOM File
Definition gdcmFile.h:34
gdcm::ImageHelper
ImageHelper (internal class, not intended for user level).
Definition gdcmImageHelper.h:60
gdcm::ImageHelper::GetPixelFormatValue
static PixelFormat GetPixelFormatValue(const File &f)
gdcm::ImageHelper::GetDimensionsValue
static std::vector< unsigned int > GetDimensionsValue(const File &f)
gdcm::PixelFormat
PixelFormat.
Definition gdcmPixelFormat.h:46
gdcm::PixelFormat::GetPixelSize
uint8_t GetPixelSize() const
gdcm::StreamImageReader
StreamImageReader.
Definition gdcmStreamImageReader.h:39
gdcm::StreamImageReader::DefinePixelExtent
void DefinePixelExtent(uint16_t inXMin, uint16_t inXMax, uint16_t inYMin, uint16_t inYMax, uint16_t inZMin=0, uint16_t inZMax=1)
gdcm::StreamImageReader::ReadImageInformation
virtual bool ReadImageInformation()
gdcm::StreamImageReader::Read
bool Read(char *inReadBuffer, const std::size_t &inBufferLength)
gdcm::StreamImageReader::SetFileName
void SetFileName(const char *inFileName)
gdcm::StreamImageReader::GetFile
File const & GetFile() const
gdcm::StreamImageReader::DefineProperBufferLength
uint32_t DefineProperBufferLength() const
gdcm::System
Class to do system operation.
Definition gdcmSystem.h:27
gdcm
Definition gdcmASN1.h:21