BlackThresholdImage  586 Magick++/lib/Image.cpp   BlackThresholdImage( image(), threshold_.c_str() );
BlackThresholdImage  124 magick/methods.h #define BlackThresholdImage  PrependMagickMethod(BlackThresholdImage)
BlackThresholdImage   39 magick/threshold.h   BlackThresholdImage(Image *,const char *),
BlackThresholdImage  929 wand/magick-image.c   status=BlackThresholdImage(wand->images,thresholds);