MagickSigmoidalContrastImageChannel 11610 wand/magick-image.c   status=MagickSigmoidalContrastImageChannel(wand,DefaultChannels,sharpen,
MagickSigmoidalContrastImageChannel  344 wand/magick-image.h   MagickSigmoidalContrastImageChannel(MagickWand *,const ChannelType,