5. The method of claim 1 , further comprising: obtaining text associated with an image; determining that an image classification model is trained for an n-gram matching the text; obtaining a feature vector for the image; and classifying the image based on the feature vector and the image classification model.
5. The method of claim 1 , further comprising: obtaining text associated with an image; determining that an image classification model is trained for an n-gram matching the text; obtaining a feature vector for the image; and classifying the image based on the feature vector and the image classification model. 10. The method of claim 5 , wherein obtaining text associated with the image comprises obtaining text that does not appear on a Web page with the image.