1. A computer system comprising: a visual attention module operative to: (a) receive scene; (b) apply a visual attention model to the scene; and, (c) predict regions within the scene that tend to attract visual attention; and, a robustness assessment module operative to interact with the visual attention module to determine a degree to which at least one of the predicted regions is robust or the scene is robust, wherein the robustness assessment module is additionally provided with a duration of time that particular regions are viewable, and additionally uses the duration to determine the degree to which at least one of the predicted regions is robust or the scene is robust.