Still, J. D., Dark, V. J., & Parkhurst, D. J. (2008). What determines where you look in photographs of complex objects? [abstract]. Paper presented at the meeting of the Midwestern Psychological Association, Chicago, IL.
Early eye fixations recorded during free viewing of photographs of natural objects were better described as regions with a high proportion of invariant features than as regions with highly salient features. This suggests that low level visual processing is biased towards visual features likely to be important for object recognition.