Editing De Bruijn sequence (section)

==de Bruijn torus==
{{main article|De Bruijn torus}}
A [[de Bruijn torus]] is a toroidal array with the property that every ''k''-ary ''m''-by-''n'' matrix occurs exactly once.

Such a pattern can be used for two-dimensional positional encoding in a fashion analogous to that described above for rotary encoding.  Position can be determined by examining the ''m''-by-''n'' matrix directly adjacent to the sensor, and calculating its position on the de Bruijn torus.