Alexander Berengolts Michael Lindenbaum On the Distribution of Saliency. 1973-1990 2006 28 IEEE Trans. Pattern Anal. Mach. Intell. 12 http://doi.ieeecomputersociety.org/10.1109/TPAMI.2006.249 db/journals/pami/pami28.html#BerengoltsL06