ThresholdQuantumOp  370 Magick++/demo/demo.cpp       example.quantumOperator( 30,40,68,112,GrayChannel,ThresholdQuantumOp,0.35*MaxRGB );
ThresholdQuantumOp  348 Magick++/lib/Magick++/Include.h   using MagickLib::ThresholdQuantumOp;
ThresholdQuantumOp 1111 magick/enum_strings.c     quantum_operator=ThresholdQuantumOp;
ThresholdQuantumOp 1192 magick/enum_strings.c     case ThresholdQuantumOp:
ThresholdQuantumOp 2145 magick/operator.c     case ThresholdQuantumOp:
ThresholdQuantumOp 9428 wand/magick_wand.c   return QuantumOperatorImage(wand->image,channel,ThresholdQuantumOp,