Rectangular pattern recognition apparatus
US4504969A · kind A · utility
32Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 11, 1982 |
| Grant date | Mar 12, 1985 |
| Priority date | — |
| Expiry date | Mar 11, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/3873
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A rectangular pattern recognition device is disclosed which operates to recognize and note the position of solid-line rectangles drawn on an input form, document, or the like. The apparatus first recognizes vertical and horizontal line segments and then discriminates the areas which lie within the joined segments. The device may further be provided with code or symbol recognition means which can discriminate symbols, e.g. an optional numbering of the rectangles from the other line segments forming the rectangles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.