Image processor with image edge emphasizing capability
US5771107A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 29, 1995 |
| Grant date | Jun 23, 1998 |
| Priority date | — |
| Expiry date | Dec 29, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/58
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image processor is provided which emphasis-processes an image to be copied with attention to the detection of black edges so that clear color copy outputs are obtained. R, G and B data read out from an original by a scanner are converted into C, M and Y complementary color data by a complementary color reversing circuit. The complementary color data are transmitted to a black edge processing circuit and to a black edge detecting circuit. The black edge detecting circuit detects the inside or the outside of a black edge, and in accordance therewith, the black edge processing circuit, for example, changes the coefficient of a spatial filter. The output of the black edge processing circuit is outputted to a printer through a black generating circuit, a tone correcting circuit and a half tone processing circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.