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Example basis functions that emerge at the end of training (100,000 iterations) for coarse (left column) and fine scale (right column). Each row corresponds to a different perturbation (Roll of 25°; Blur of σ = 4 px; Tilt of 2°). The pan perturbation case is not considered, as it does not induce any significant change in left and right part of the bases as compared to the control case. See also the video available online for the roll perturbation (Lonini et al., 2013a).
