A drug identification device, an image processing device, an image processing method, and a program are provided that appropriately determine whether identification information added to a drug is added by mark engraving or by character printing. The above problem is solved by an image processing device including: an obtaining unit configured to obtain a plurality of images of a drug having identification information added by mark engraving or by character printing on a surface of the drug, with emitting directions of light to the surface different from each other； an image comparing unit configured to compare the plurality of images with each other； and a determining unit configured to determine whether the identification information is added by mark engraving or by character printing, according to a comparison result by the image comparing unit.
