“…Second, to overcome the propensity of bottom-up saliency to respond more to edges than (homogeneous) object interiors, they include some form of spatial propagation of saliency information. This can be implemented various ways, including conditional random fields (CRFs) [30,31], random walk models [19], energy models [10,19], or diffusion processes [38]. Third, beyond the classical measures of bottom-up saliency, these models may also account for objectness features.…”