Figure 10.

(A) The ‘apparent blur’ measure over eccentricity for the scene stimulus set. Unlike the simple edge stimuli of Figure 6, natural scenes typically evoke positive apparent blur scores, which we may interpret as ‘apparent sharpness’. In general, regions of a natural scene at optical infinity (as in our stimulus set) will evoke these positive scores; negative scores generally correspond to featureless regions, usually sky, where most content is in a very low-frequency gradient.