DefineRegion      165 magick/segment.c   DefineRegion(const short *,ExtentPacket *);
DefineRegion      330 magick/segment.c   while (DefineRegion(extrema[Red],&red))
DefineRegion      333 magick/segment.c       while (DefineRegion(extrema[Green],&green))
DefineRegion      336 magick/segment.c           while (DefineRegion(extrema[Blue],&blue))