Chapter 10: Processes of Perception and Analysis

Section 7: Visual Perception

Real textures

The textures I consider in the main text are all based on arrays of discrete black and white squares. One can also consider textures associated, say, with surface roughness of physical objects. Models of these are often needed for realistic computer graphics. Common approaches are to assume that the surfaces are random with some frequency spectrum, or can be generated as fractals using substitution systems with random parameters. In recent times, models based on wavelets have also been used.

From Stephen Wolfram: A New Kind of Science [citation]