Socializing the Semantic Gap: A Survey on Image Tagging and Retrieval
Everything you wanted to know about image tagging, tag refinement and social image retrieval. Our paper has been (finally) accepted to ACM Computing Surveys! This is a titanic effort, by Xirong Li, Tiberio Uricchio, myself, Marco Bertini, Cees Snoek and Alberto Del Bimbo, to structure the growing literature in the field, understand the ingredients of the main works, clarify their connections and difference, and recognize their merits and limitations.
A pre-print is available on arXiv and the source code is on GitHub.