ABSTRACT
In preattentive texture perception only conspicuous local features (called textons) of elongated blobs (lines), with certain orientations, widths, lengths and colors, their terminators (ends of lines), and their crossings, can be perceived; the relative position between these textons is ignored. Thus, outside a narrow peephole of focal attention one cannot distinguish, for example, an L from a T. What is more, for complex scenes, up-down and left-right reversals have no effect on the textons and their densities; therefore outside the minute disc of attention even without adaptation no perceptual change can be noticed. All the adaptational phenomena of Kohler are probably restricted to this disc of attention. Often this disc is a small fraction of the fovea. This simplification might establish a close link between two seemingly remote paradigms.
