ColorToGrayOperator.h

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#ifndef Col2Gvi_H
#define Col2Gvi_H

#include "ImageToImageOperator.h"
#include "ColorImageRGB8.h"
#include "GrayLevelImage8.h"

namespace puma2 {

template <class C, class G>
class ColorToGrayOperator  : 
        public ImageToImageOperator<C,G>
{
  public:

    ColorToGrayOperator();

        ColorToGrayOperator(const C & iImg, G & oImg)
        {
              // NB: we can call this method only here, after
                  // complete construction of the base class
                  // i.e., we may not call this function in a base class
                  // constructor as virtual function tables are not 
                  // set up properly there!
              this->operator()(iImg,oImg); // will call virtual functions
        }

    virtual ~ColorToGrayOperator();

        virtual void apply(const C & iImg, G & oImg);
};

template <class C, class G>
ColorToGrayOperator<C,G>::ColorToGrayOperator() 
{
}

template <class C, class G>
ColorToGrayOperator<C,G>::~ColorToGrayOperator() 
{ 
  
};

template <class C, class G>
void ColorToGrayOperator<C,G>::apply(const C & iImg, G & oImg)
{
        for (int i = iImg.getHeight() - 1 ; i >= 0; --i) {
          const typename C::PixelType *rowPtr = iImg[i];
          for (int j = iImg.getWidth() - 1 ; j >= 0; --j) {
                oImg[i][j] = 
                   ((3 * int(rowPtr[j][0]) +
                     6 * int(rowPtr[j][1]) +
                         int(rowPtr[j][2])) / 10);
          }
        }
}

}

#endif