[Insight-users] Image reader problem

[Luis Ibanez]

Hi Charles,

Most ITK IO classes rely on the functionalities of std::streams.

If you can use

      * std::ifstream
      * std::ofstream

for managing your filenames (in Unicode) then most ITK IO classes
should work fine as well.

There are however several ImageIO classes that rely on third party
libraries, (PNG, JPEG...) and for those we may have to check type
by type.


Could you let us know if you can (independently of ITK) read
and write files using std::ifstream and std::ofstream when
the filenames contain characters requiring a unicode
representation ?


    Please let us know what you find,


       Thanks


          Luis


-----------------------
Charles Knox wrote:
> Thanks Bill and Niels,
> 
> I ran itkGDCMImageIOTest in debugging mode (after hard coding in some 
> file names) and it runs fine!  I can step into ITK code and see the file 
> names being saved.  Both ITK and my software are compiled using the 
> _MBCS option (multi-byte character strings), so I don't think it's a 
> problem with multi-byte characters, although am still looking at this.
> 
> Does ITK support Unicode or MBCS?  I don't know.
> 
> So, as of now, I'm stumped. 
> 
> Regards,
> Charlie
> 
> Bill Lorensen wrote:
> 
>>Charles,
>>
>>Do the tests in Insight/Testing/Code/IO run OK?
>>
>>We don't have any VS 9.0 platforms in our testing suite unfortunately.
>>
>>Bill
>>
>>On Mon, May 5, 2008 at 12:37 PM, Charles Knox <knoxcharles at qwest.net> wrote:
>>  
>>
>>>The function ReadDICOMImage() gets called to test for/read a DICOM image
>>>file.
>>>It has worked consistently for me through ITK versions 1.x through 3.4 when
>>>compiled
>>>with MS Visual C++ 6.0.  But now, when compiling with MS Visual Studio v9.0
>>>for
>>>x86 and under Windows Vista, the debugger traps an access violation from the
>>>destructor ~ImageSource() (located in file itkImageSource.h).
>>>
>>>-----------------------------------------------------------------------------------
>>>
>>>BOOL CImageData::ReadDICOMImage( CString &csFileName, IMAGEPARAMS &iParam )
>>>{
>>>    // First check for a DICOM file.
>>>    itk::GDCMImageIO::Pointer gdcmIO = itk::GDCMImageIO::New();
>>>
>>>    // This works but commented out to get to 'reader'
>>>    //if (!gdcmIO->CanReadFile((LPCTSTR)csFileName)
>>>    //    return FALSE;
>>>
>>>    typedef signed short                PixelType;
>>>    // Set dimensions to 3 to have reader return z-value
>>>    const    UINT                    Dimension = 3;
>>>    typedef itk::Image< PixelType, Dimension >    ImageType;
>>>    typedef itk::ImageFileReader< ImageType >    ReaderType;
>>>
>>>    ReaderType::Pointer reader = ReaderType::New();
>>>
>>>    reader->SetFileName( (LPCTSTR)csFileName);
>>>    reader->SetImageIO( gdcmIO );
>>>
>>>    // Return prematurely to invoke 'reader' destructor
>>>    // when going out of scope.
>>>    return FALSE;
>>>
>>>    try {
>>>        reader->Update();
>>>    } catch (std::exception &err) {
>>>        string msg = err.what();
>>>        AfxMessageBox(msg.c_str());
>>>        return FALSE;
>>>    }
>>>
>>>...
>>>---------------------------------------------------------------------------
>>>
>>>Debugger stops at the destructor ~ImageSource()
>>>
>>>...
>>>    * SmartPointer to a DataObject. If a subclass of ImageSource has
>>>   * multiple outputs of different types, then that class must provide
>>>   * an implementation of MakeOutput(). */
>>>  virtual DataObjectPointer MakeOutput(unsigned int idx);
>>>
>>>protected:
>>>  ImageSource();
>>>  virtual ~ImageSource() {}   <- Debugger stops here
>>>
>>>  /** A version of GenerateData() specific for image processing
>>>   * filters.  This implementation will split the processing across
>>>   * multiple threads. The buffer is allocated by this method. Then
>>>  ...
>>>
>>>_______________________________________________
>>>Insight-users mailing list
>>>Insight-users at itk.org
>>>http://www.itk.org/mailman/listinfo/insight-users
>>>
>>>
>>>    
>>>
>>
>>
>>
>>  
>>
> 
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