You can refer to the descriptions in something such as a poem or song, and the pictures they create in your mind, as its imagery.
the nature imagery of the ballad.
民谣中的自然意象。
Her prose was poetic and subtly energized by her use of visual imagery.
她的散文十分诗意,视觉意象的巧妙应用使其充满了生气。
You can refer to pictures and representations of things as imagery, especially when they act as symbols.
This is an ambitious and intriguing film, full of striking imagery.
这是一部气势恢宏、引人入胜的电影,其中颇具动人心魄的场面。
Sexual imagery in advertising is hardly anything new.
广告里的色情影像早已不是什么新鲜事物了。