Jürgen Stauder Gael Gouzien Bertrand Chupeau Loic Nunez Jean-Ronan Vigouroux Ewa Kijak Semantic image browsing using hidden categories and confidence values. 54-63 2003 Storage and Retrieval for Media Databases http://dx.doi.org/10.1117/12.476260 conf/spieSR/2003 db/conf/spieSR/spieSR2003.html#StauderGCNVK03