MagickSigmoidalContrastImageChannel 11659 wand/magick-image.c   status=MagickSigmoidalContrastImageChannel(wand,DefaultChannels,sharpen,
MagickSigmoidalContrastImageChannel  345 wand/magick-image.h   MagickSigmoidalContrastImageChannel(MagickWand *,const ChannelType,