Methods and systems for forming images of moving optical codes
US7383994B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 3, 2005 |
| Grant date | Jun 10, 2008 |
| Priority date | — |
| Expiry date | Feb 2, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/1491
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Methods and systems form a decodable composite image of an optical code that experiences motion. A method according to one embodiment forms a first image of at least a first portion of the optical code at a first time and a second image of at least a second portion of the optical code at a second time, whereby the optical code may undergo relative motion between the first and second times. The method determines one or more of the following parameters of an affine transformation relating the second image to the first image: vertical offset, horizontal offset, horizontal skew factor, vertical skew factor, horizontal scale factor, and vertical scale factor. The method aligns one of the first and second images to the other by utilizing the determined parameters to implement the affine transformation, thereby forming an aligned image. Finally, the method combines elements of the aligned imaged and the other image to form the decodable composite image of the optical code.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.