The document discusses denotation and connotation in images through captions. Denotation refers to the literal or direct information conveyed, such as there being two girls and their actions. Connotation refers to implied or inferred meanings associated with the image that come from captions. Three example captions are provided that provide different connotations - the first focuses on one girl going home, the second on the other girl tricking her friend, and the third on both girls being happy friends.