DifferenceImage  2307 magick/command.c       difference_image=DifferenceImage(reference_image,compare_image,
DifferenceImage    41 magick/compare.h   *DifferenceImage(const Image *reference_image,const Image *compare_image,
DifferenceImage  1330 wand/magick_wand.c   compare_image=DifferenceImage(wand->image,reference->image,