Maria Vanrell Ramón Baldrich Anna Salvatella Robert Benavente Francesc Tous Induction operators for a computational colour-texture representation. 92-114 2004 94 Computer Vision and Image Understanding 1-3 http://dx.doi.org/10.1016/j.cviu.2003.10.017 db/journals/cviu/cviu94.html#VanrellBSBT04