6. The method of claim 5 wherein the association score indicates how strongly the linguistic word is associated with any image in a set of images in which the visual word occurs.
6. The method of claim 5 wherein the association score indicates how strongly the linguistic word is associated with any image in a set of images in which the visual word occurs. 12. The method of claim 6 , further comprising: receiving a new image; generating a new set of visual words; wherein each visual word in the new set of visual words represents a characteristic of the new image; receiving a first set of linguistic words; wherein the first set of linguistic words is associated with the new image; for each visual word in the set of new visual words and each linguistic word in the first set of linguistic words, performing the step of deriving an association score; wherein the first node represents the each visual word; wherein the second node represents the each linguistic word; wherein the step of deriving an association score further comprises storing the association score in a set of association scores; based at least in part on the set of association scores, eliminating linguistic words from the first set of linguistic words.