Dichromatic reading device
US4479242A · kind A · utility
40Cited by
3References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 2, 1982 |
| Grant date | Oct 23, 1984 |
| Priority date | — |
| Expiry date | Mar 2, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V10/143
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A dichromatic reading device is disclosed in which the difference is taken between output signals from a first image sensor receiving reflected light directly and a second image sensor receiving the reflected light after being passed through a filter which blocks a specific color component of the reflected light. The difference is converted into a binary signal which provides one color image information and which together with a binary signal obtained from at least the second image sensor and inverted, is NANDed to provide a second color image information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.