MagickLevelImageChannel 4036 TclMagick/generic/TclMagick.c 	result = MagickLevelImageChannel(wandPtr, chanTypes[chanIdx], black, gamma, white);
MagickLevelImageChannel  207 wand/magick_wand.h   MagickLevelImageChannel(MagickWand *,const ChannelType,const double,