[Insight-users] A bug in itkAnalyzeImageIO?

[Bill Lorensen]

Jian,
Can you please try the same program with itkNiftiImageIO instead of
itkAnalyzeImageIO? The nifti reader/writer should produce valid analyze
files. We are looking at replacing itkAnalyzeImageIO's implementation with
itkNiftiImageIO. Nifti is a file format with a substantial and active
community. If we do this, we will keep the Analyze API.

Thanks,

Bill

On Thu, Feb 7, 2008 at 2:25 PM, Jian Wu <eewujian at yahoo.com> wrote:

> Hi,
> I'm doing image format conversion from other image types to Analyze 7.5.
> The program did not give me any error message. However I doubt it may not
> handle the image header information properly. The images I generated in
> Analyze 7.5 format can be viewed using MRIcro image viewer. But when I
> tried to opened it using Matlab function analyze75read, it gave me an error
> message "Reference to non-existent field 'ImgDataType'." I studies the ITK
> source code and found out the line 1128 of itkAnalyzeImageIO.cxx states:
>    switch( this->m_Hdr.dime.datatype)
> Here "this->m_Hdr" has not been filled with proper image information yet
> when the input image is not in Analyze image format. I think
> "this->m_ComponentType" should be referred instead. My test code is attached
> here. I used "brainweb1e1a10f20.mha" as the input image.
>
> Jian
>
> Command line:
> ImageReadWriteAnalyze brainweb1e1a10f20.mha brainweb1e1a10f20.img
>
> Source Code:
>
>
> /*=========================================================================
>
>  Program:   Insight Segmentation & Registration Toolkit
>  Module:    $ ImageReadWriteAnalyze.cxx $
>  Language:  C++
>  Date:      $Date: 2008/02/07 $
>  Version:   $Revision: 1.0 $
>  Author:     Jian Wu
>
>
> =========================================================================*/
> #if defined(_MSC_VER)
> #pragma warning ( disable : 4786 )
> #endif
>
> #ifdef __BORLANDC__
> #define ITK_LEAN_AND_MEAN
> #endif
>
> #include "itkImageFileReader.h"
> #include "itkImageFileWriter.h"
> #include "itkAnalyzeImageIO.h"
>
> #include "itkImage.h"
>
>
> int main( int argc, char ** argv )
> {
>  if( argc < 3 )
>    {
>    std::cerr << "Usage: " << std::endl;
>    std::cerr << argv[0] << " inputImageFile  outputImageFile " <<
> std::endl;
>    return EXIT_FAILURE;
>    }
>
>  typedef unsigned short      PixelType;
>  const   unsigned int        Dimension = 3;
>  typedef itk::Image< PixelType, Dimension >    ImageType;
>
>  typedef itk::ImageFileReader< ImageType >  ReaderType;
>  typedef itk::ImageFileWriter< ImageType >  WriterType;
>  typedef itk::AnalyzeImageIO                 ImageIOType;
>
>
>  ReaderType::Pointer reader = ReaderType::New();
>  WriterType::Pointer writer = WriterType::New();
>  ImageIOType::Pointer analyzeIO = ImageIOType::New();
>
>  const char * inputFilename  = argv[1];
>  const char * outputFilename = argv[2];
>
>  reader->SetFileName( inputFilename  );
>  writer->SetFileName( outputFilename );
>
>  writer->SetInput( reader->GetOutput() );
>  writer->SetImageIO( analyzeIO );
>
>  try
>    {
>    writer->Update();
>    }
>  catch( itk::ExceptionObject & err )
>    {
>    std::cerr << "ExceptionObject caught !" << std::endl;
>    std::cerr << err << std::endl;
>    return EXIT_FAILURE;
>    }
>
>  return EXIT_SUCCESS;
> }
>
>
>
>
>
>
>
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