Distinguishing Photographs and Graphics on the World Wide Web
When we search for images in multimedia documents, we often have in mind speciﬁc image types that we are interested in; examples are photographs, graphics, maps, cartoons, portraits of people, and so on. This paper describes an automated system that classiﬁes Web images as photographs or graphics, based on their content. The system ﬁrst submits the images into some tests, which look at the image content, and then feeds the results of those tests into a classiﬁer. The classiﬁer is built using learning techniques, which take advantage of the vast amount of training data that is available on the Web. Text associated with an image can be used to further improve the accuracy of the classiﬁcation. The system is used as a part of WebSeer, an image search engine for the Web.
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