levelChannel 258 Magick++/demo/demo.cpp example.levelChannel( RedChannel, 0.20*MaxRGB, 0.90*MaxRGB, 1.20 ); levelChannel 398 Magick++/lib/Magick++/Image.h void levelChannel ( const ChannelType channel, levelChannel 606 Magick++/lib/STL.cpp image_.levelChannel( _channel, _black_point, _white_point, _mid_point );