[Insight-users] Reading Jpeg file

[Bill Lorensen]

Liqin,

Can you please send the command line you are using and the exact
message printed by the exception?

Bill

On Wed, Oct 22, 2008 at 6:20 PM, Wang, Liqin <Wang.Liqin at mayo.edu> wrote:
>  Hi,All
>
> I want to read the Jpeg file by using the following codes:
>
>
> //++++++++++++++++++++++++++++++
>  typedef itk::ImageFileReader< ImageType >  ReaderType;
>  typedef itk::JPEGImageIO ImageIOType;
>  // Software Guide : EndCodeSnippet
>
>  ImageIOType::Pointer jpegIO = ImageIOType::New();
>
>  ReaderType::Pointer reader = ReaderType::New();
>  const char * filename = argv[1];
>  reader->SetFileName( filename );
>  reader->SetImageIO( jpegIO );
>  reader->Update();
>
>
>
> //+++++++++++++++++++++++++++
>
>
> But I kept getting the exception in the following function:
>
> void JPEGImageIO::ReadImageInformation()
> {
>  m_Spacing[0] = 1.0;  // We'll look for JPEG pixel size information
> later,
>  m_Spacing[1] = 1.0;  // but set the defaults now
>
>  m_Origin[0] = 0.0;
>  m_Origin[1] = 0.0;
>
>  // use this class so return will call close
>  JPEGFileWrapper JPEGfp(m_FileName.c_str(),"rb");
>  FILE* fp = JPEGfp.m_FilePointer;
>  if(!fp)
>    {
>    itkExceptionMacro("Error JPEGImageIO could not open file: "
>                      << this->GetFileName());
>    return;
>    }
>    .
>    .
>    .
>
>
> Attached is a sample jpeg image used to test the program.
>
> Thanks for  helps.
>
> Liqin
>
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