The QBIC Project: Querying Images by Content, Using Color, Texture, and Shape. - Wayne Niblack; Ron Barber; William Equitz; Myron Flickner; Eduardo H. Glasman; Dragutin Petkovic; Peter Yanker; Christos Faloutsos; Gabriel Taubin (Storage and Retrieval for Image and Video Databases (SPIE), 1993)