Anoto

Anoto Group AB (formerly C Technologies) is a Swedish cloud-based software provider (SaaS).

Models include: Cognitive Artificial Intelligence is a cloud based AI program designed for offline education use.

Anoto's dot pattern, when used with aDNA, allows for the unique and unobtrusive marking of physical objects.

This then enables easy identification of individual objects using ubiquitous mobile devices such as phones and tablets.

aDNA is opening up new possibilities for product innovation, marketing insights, and supply-chain control.

Simplified principle of the Anoto digital pen.
The camera identifies a 6×6 matrix of dots, each displaced from the blue grid (not printed) in one of 4 directions.
The combinations of relative displacements of a 6-bit de Bruijn sequence between the columns, and between the rows gives its absolute position on the digital paper.