Method and device for reading a bar code of variable orientation on a substantially motionless medium
US5155344A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1991 |
| Grant date | Oct 13, 1992 |
| Priority date | — |
| Expiry date | Dec 20, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/1092
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides a method and apparatus for reading bar codes having variable orientations on a substantially motionless medium. A portion of the surface of the medium having a bar code in a variable orientation is scanned using a light source and a photodetector receives the beam reflected from the surface and generates signals corresponding to the scanning lines. The signal corresponds to the scanning lines and has amplitude peaks corresponding to the intersection of the bars by the light beam. The amplitude peaks and position of the peaks on the scanning lines are recorded. The sum of the amplitude peaks is formed in the positions of the bars and deduced from the sums of the peaks amplitudes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.