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To focus on regions of natural images containing shape information, we automatically selected high contrast natural image patches for use as stimuli. A. Grayscale stimuli for the 8 models we tested: RND, ICA, L2, LP, MEC2, MEC4, MEC8, MEC16. B. The binary version of A where the number of on and off pixels are held equal. On any only trial, the observer viewed only one set of natural image samples and one set of samples from a single model.
