RobidouxSharpFilter  600 Magick++/lib/Magick++/Include.h   using MagickCore::RobidouxSharpFilter;
RobidouxSharpFilter 1108 magick/option.c     { "RobidouxSharp", RobidouxSharpFilter, UndefinedOptionFlag, MagickFalse },
RobidouxSharpFilter  794 magick/resize.c     { RobidouxSharpFilter, BoxFilter      },  /* Sharper Cubic Keys for EWA   */