RobertsKernel     967 magick/morphology.c     case RobertsKernel:
RobertsKernel    1333 magick/morphology.c     case RobertsKernel:
RobertsKernel    1097 magick/option.c     { "Roberts", (ssize_t) RobertsKernel, MagickFalse },