This conceptual idea of attentional control by a saliency map was subsequently implemented in biologically realistic computational models [24]–[26]. Over the last decade and a half, these models have been refined, tested, and applied by many groups. Borji and Itti [27] provide an excellent overview of the current state of the art of visual attention modeling, including a taxonomy of models (information theoretical, cognitive, graphical, spectral, pattern classification, Bayesian, etc.).