Fig. 1.

Three classic findings in human texture perception. A: texture discrimination: some textures are easier to distinguish than others. For instance, it is easier to find a texture of Ls within a texture made of Os (left) than to find a patch of +s within a texture made of Ts. Numbers at the bottom right are average times taken by humans to locate the target texture. B: texture asymmetry: it is sometimes easier to find a texture A inside a texture B than vice versa. For instance, it is easier to locate arrows among Rs (left) than to locate Rs among arrows (right). C: randomly oriented textures: some textures become harder to distinguish when their elements are randomly oriented. For instance, the border between the L and T textures becomes extremely hard to find when the Ls and Ts are randomly oriented (left), but the border between the Rs and Ls becomes only slightly harder to find (right).