Edge detection using patterned background
US5065237A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 1, 1990 |
| Grant date | Nov 12, 1991 |
| Priority date | — |
| Expiry date | Aug 1, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S209/90
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for singulating mailpieces such as envelopes spread out on a moving conveyor belt includes a robot for picking up the mailpiece associated with a leading edge. The conveyor belt has alternate black-and-white longitudinal stripes. A TV camera views the belt surface, and produces video representing the stripes and any mailpieces. The video is processed to produce signals representative of the locations of transitions in the video along the centers of the black and/or white stripes. The location representative signals are processed by calculating lines corresponding to one or more leading edges of the mailpiece, which may then be used for controlling the robot in known manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.