The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 15, 2003
Filed:
Oct. 02, 2000
Mats Petter Pettersson, Lund, SE;
Tomas Edso, Lund, SE;
Anoto AB, Lund, SE;
Abstract
A method and a device for determining a virtual raster of a code pattern consisting of a plurality of marks with associated coordinates m . Each mark is located at a nominal position but displaced from the nominal position in one of a plurality of directions, depending upon the value of the mark. The nominal positions form raster points g of the virtual raster, and the raster points are situated on raster lines, which intersect at a first angle. In addition there is a device for determining an initial vector V on the basis of the coordinates m , m of one or more marks, which initial vector extends approximately between a first and a second adjacent raster point g , g . A calculation device determines a second vector V , which forms said angle with the first vector and is the same length as the first vector and extends from the second raster point g approximately to a third raster point g . The mark coordinate m which is associated with the third raster point g is determined. Subsequently the actual coordinates are calculated for the third raster point on the basis of the third mark's coordinates and its value. The actual coordinates for the third raster point are stored, after which the procedure is repeated taking the second vector as the starting point.