16. The computer-implemented method of claim 15 , further comprising: receiving, from a client device, a search query that references an image; determining that at least a portion of the image is associated with the term; determining, using the at least one database, one or more images that are associated with the term; and sending, to the client device, information responsive to the search query, the information including at least the one or more images.
15. The computer-implemented method of claim 14 , further comprising: generating at least one database that describes respective associations between the term and the at least one respective region of each image in the plurality of images.