/**============================================================================
 *
 * \file   RGB_to_luminance_filter.hpp
 * \brief  Declaration for the RGBToLuminanceFilter class.
 *
 * \author Leblanc Christophe.
 * \date   16/11/2012
 * \email cleblancad@gmail.com
 *
 * Code inspired from:
 * 'Getting Started with ITK + VTK'
 * L. Ibanez, W. Schroeder, Insight Software Consortium.
 *
 *===========================================================================*/

#ifndef TOMOPROCESS_FILTER_RGB_TO_LUMINANCE_FILTER_HPP
#define TOMOPROCESS_FILTER_RGB_TO_LUMINANCE_FILTER_HPP

#include "filter.hpp"
#include "detail/rgb_to_luminance_filter_impl.hpp"

TOMOPROCESS_OPEN_GLOBAL_NAMESPACE
TOMOPROCESS_OPEN_FILTER_NAMESPACE

/** \class RGBToLuminanceFilter
 * \brief Converts a RGB image to a grayscale image.
 */
template<class ImageT>
class RGBToLuminanceFilter
  : public Filter<
      itk::RGBToLuminanceImageFilter<
        typename ImageT::InputImageType,
	typename ImageT::OutputImageType>,
      ImageT>
{
public:
  /// \brief This class.
  typedef RGBToLuminanceFilter 	Self;
  
  /// \brief Parent class.
  typedef Filter<
    itk::RGBToLuminanceImageFilter<
      typename ImageT::InputImageType,
      typename ImageT::OutputImageType>,
    ImageT> SuperClass;
  
  /// \brief Image type.
  typedef ImageT ImageType;
};

TOMOPROCESS_CLOSE_FILTER_NAMESPACE
TOMOPROCESS_CLOSE_GLOBAL_NAMESPACE

#endif // TOMOPROCESS_FILTER_RGB_TO_LUMINANCE_FILTER_HPP