[Insight-developers] PNGIO problem

[mark foskey]

It seems that ImageIOFactory::CreateImageIO(const char* path) makes sure
that it can read "path" before returning the IO object.  This is fine if
you are interested in input, but it doesn't work so well for output.  Am
I doing something wrong?

An example is the following try block.  I get an error on output because 
a writer is not generated, and generation fails because the output file 
(which doesn't exist yet) can't be read.

      try
      {

          // Enable reading and writing of PNG files.
          itk::PNGImageIOFactory::RegisterOneFactory();

          // . . . read and process the file . . .

          // Instantiate a writer and attach it to the filter.
          typedef itk::ImageFileWriter<ImageType> ImageWriterType;
          ImageWriterType::Pointer writer = ImageWriterType::New();
          writer->SetInput(myFilter->GetOutput());
          writer->SetFileName(argv[2]);

          // Execute the process.
          writer->Write();

      }
      catch(itk::ExceptionObject &err)
      {
          std::cerr << err << std::endl;
          return 1;
      }

-- 
Mark Foskey    (919) 843-5436   Computer-Aided Diagnosis and Display Lab
mark_foskey@unc.edu             Department of Radiology, CB 7515, UNC
http://www.cs.unc.edu/~foskey   Chapel Hill, NC  27599-7515


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