Average9InterpolatePixel  658 Magick++/lib/Magick++/Include.h   using MagickCore::Average9InterpolatePixel;
Average9InterpolatePixel 1178 magick/option.c     { "Average9", Average9InterpolatePixel, UndefinedOptionFlag, MagickFalse },
Average9InterpolatePixel 4466 magick/pixel.c     case Average9InterpolatePixel:       /* nearest 9 neighbours */
Average9InterpolatePixel 4473 magick/pixel.c       if (interpolate == Average9InterpolatePixel)