It has to be easier than using Import / Export:
(*Head[gaxes] Head[gbig] are graphics*)
Export["C:UsersÀ0Desktopgaxes.gif", gaxes, "GIF"];
ga = Import["C:UsersÀ0Desktopgaxes.gif"];
Export["C:UsersÀ0Desktopgbig.gif", gbig, "GIF"];
gb = Import["C:UsersÀ0Desktopgbig.gif"];
blck = ImageCompose[ColorNegate[ga], ColorNegate[ImageCrop[gb]]]
wht = ColorNegate[blck]
(*Head[ga] Head[gb] are images*)
THE IMAGE STILL HAS MUTATIONS - DO NOT USE!
Attachments: