[Insight-users] guest image pixel type

[Bill Lorensen]

Here's what we do in Slicer3:

  #include "itkPluginUtilities.h"
  ...
  itk::ImageIOBase::IOPixelType pixelType;
  itk::ImageIOBase::IOComponentType componentType;

  try
    {
    itk::GetImageType (fileName, pixelType, componentType);
   }

    // This filter handles all types on input, but only produces
    // signed types

    switch (componentType)
      {
      case itk::ImageIOBase::UCHAR:
      case itk::ImageIOBase::CHAR:
        return DoIt( argc, argv, static_cast<char>(0));
        break;
      case itk::ImageIOBase::USHORT:
      case itk::ImageIOBase::SHORT:
        return DoIt( argc, argv, static_cast<short>(0));
        break;
      case itk::ImageIOBase::UINT:
      case itk::ImageIOBase::INT:
        return DoIt( argc, argv, static_cast<int>(0));
        break;
      case itk::ImageIOBase::ULONG:
      case itk::ImageIOBase::LONG:
        return DoIt( argc, argv, static_cast<long>(0));
        break;
      case itk::ImageIOBase::FLOAT:
        return DoIt( argc, argv, static_cast<float>(0));
        break;
      case itk::ImageIOBase::DOUBLE:
        return DoIt( argc, argv, static_cast<double>(0));
        break;
      case itk::ImageIOBase::UNKNOWNCOMPONENTTYPE:
      default:
        std::cout << "unknown component type" << std::endl;
        break;
      }
    }
  catch( itk::ExceptionObject &excep)
    {
    std::cerr << argv[0] << ": exception caught !" << std::endl;
    std::cerr << excep << std::endl;
    return EXIT_FAILURE;
    }
  return EXIT_SUCCESS;
}

Where itkPluginUtilities.h is here:
http://viewvc.slicer.org/viewcvs.cgi/trunk/Base/CLI/itkPluginUtilities.h?rev=5669&view=markup

For an example of a complete program see:
http://viewvc.slicer.org/viewcvs.cgi/trunk/Applications/CLI/Add.cxx?rev=10441&view=markup