Patent Number: 6,674,427

Title: Position determination II--calculation

Abstract: A method of providing a position code on a surface, which position code codes a plurality of positions on the surface. A cyclic number series is used, which has the characteristic that the position in the number series of each number sequence of a first predetermined length is determined unambiguously. The number series is printed out a plurality of times across the surface, different rotations of the first cyclic number series being used so that displacements arise between adjacent number series. The surface is divided into a plurality of code windows, which comprise at least three number series and have one number series overlapping one number series of adjacent code windows. The position of the code windows in the x-direction is coded by means of the displacements between the cyclic number series belonging to the code window. A second number series is used for coding in the y-direction. The invention also concerns a method and a device for determining the position, and a device and a computer program product for implementing the method.

Inventors: Pettersson; Mats Petter (Lund, SE), Edso; Tomas (Lund, SE)

Assignee: Anoto AB

International Classification: G06F 3/033 (20060101); G06K 19/06 (20060101); G06K 7/14 (20060101); G06K 7/10 (20060101); G03G 005/00 ()

Expiration Date: 01/06/2021