Apparatus for reading and digital processing of color images
US4954888A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 6, 1989 |
| Grant date | Sep 4, 1990 |
| Priority date | — |
| Expiry date | Feb 6, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/56
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The apparatus for reading and digital processing of color images comprises groups of CCD sensing elements for reading the individual pixels forming the image. Each group of the sensing elements is associated with one primary color, for generating corresponding reading signals, which control a color indication circuit generating a color indicatory signal for indicating the presence of any color in the image. The colour indicator signal is derived from a table of zones of colours which is recorded in a ROM and can be addressed by the reading signals of the various colours, input from corresponding reading elements via compensation circuits. The colour signal is capable of controlling second selective scanning of document for recording the reading signals for all the primary colours of the image. The ROM is also capable of providing an indication of the mixture of colours of each pixel, which is compared to a predetermined mask for the purposes of suppressing a particular mixture of colours from the recording.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.