[Insight-users] ImageSeriesReadWrite only reads first file.

[Emma Ryan]

The files are named as file000.png, file001.png, ...file031.png.

The .vtk file generated is of a decent size. Also, when I read in the .vtk and write out Image series, using the ImageReadImageSeriesWrite.cpp file,  I can recreate the original 32 2D slices.

I am simply not able to view them using volview. Any clues !  Volview does ask for Z-spacing and units, but then it displays nothing.

Emma


----- Original Message ----
From: Andinet Enquobahrie <andinet.enqu at kitware.com>
To: Emma Ryan <eryanvtk at yahoo.com>
Sent: Tuesday, June 12, 2007 5:31:13 AM
Subject: Re: [Insight-users] ImageSeriesReadWrite only reads first file.

Emma Ryan wrote:

>
> Hi,
>
>   I am trying to generate a .vtk file (3D ) from a  set of .png 
> images. I use the ImageSeriesReadWrite.cxx example provided in ITK as 
> is. My command line syntax is  "SeriesRW.exe 0 31 output.vtk"


How are the png images named? Give us a list of their names... The issue 
might be with the file format..

>
> i.e SeriesRW is the executable, there are 32 slices starting from 0, 
> and the output format is supposed to be .vtk , so that I can open it 
> using Volview.
>
> While the program executes with no errors or warnings, when I open 
> output.vtk file in Volview, it seems to be empty.
>
> I am not sure why this.  If anyone has a clue as to why this happens, 
> please let me know.  Here is the code.
>
> #include "itkImage.h"
> #include "itkImageSeriesReader.h"
> #include "itkImageFileWriter.h"
> #include "itkNumericSeriesFileNames.h"
> #include "itkPNGImageIO.h"
>
>
> int main( int argc, char ** argv )
> {
>  
>   if( argc < 4 )
>     {
>     std::cerr << "Usage: " << std::endl;
>     std::cerr << argv[0] << " firstSliceValue lastSliceValue  
> outputImageFile " << std::endl;
>     return EXIT_FAILURE;
>     }
>
>
>   typedef unsigned char                       PixelType;
>   const unsigned int Dimension = 3;
>
>   typedef itk::Image< PixelType, Dimension >  ImageType;
>
>   typedef itk::ImageSeriesReader< ImageType >  ReaderType;
>   typedef itk::ImageFileWriter<   ImageType >  WriterType;
>
>   ReaderType::Pointer reader = ReaderType::New();
>   WriterType::Pointer writer = WriterType::New();
>
>   const unsigned int first = atoi( argv[1] );
>   const unsigned int last  = atoi( argv[2] );
>
>   const char * outputFilename = argv[3];
>
>
>   typedef itk::NumericSeriesFileNames    NameGeneratorType;
>
>   NameGeneratorType::Pointer nameGenerator = NameGeneratorType::New();
>
>
>   nameGenerator->SetSeriesFormat( "file%03d.png" );
>
>   nameGenerator->SetStartIndex( first);
>   nameGenerator->SetEndIndex( last );
>   nameGenerator->SetIncrementIndex( 1 );
>
>
>
>   reader->SetImageIO( itk::PNGImageIO::New() );
>
>  reader->SetFileNames( nameGenerator->GetFileNames()  );
>
>
>   writer->SetFileName( outputFilename );
>
>   writer->SetInput( reader->GetOutput() );
>
>   try
>     {
>     writer->Update();
>     }
>   catch( itk::ExceptionObject & err )
>     {
>     std::cerr << "ExceptionObject caught !" << std::endl;
>     std::cerr << err << std::endl;
>     return EXIT_FAILURE;
>     }
>
>
>   return EXIT_SUCCESS;
> }
>
>
> Thank you,
> Emma
>
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-- 
==========================================================
Andinet A. Enquobahrie, PhD
R&D Engineer
Kitware Inc.

28 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-371-3971 x124
www.kitware.com









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