Color image forming method and apparatus for improved image color reproducibility
US5136372A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 1989 |
| Grant date | Aug 4, 1992 |
| Priority date | — |
| Expiry date | Sep 12, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/56
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image forming apparatus for forming a color image in a plurality of colors including a plurality of image forming units which are different in image forming color from each other, a spatial frequency detector for detecting a spatial frequency relating to an image of a prescribed color for every portion of an image to be formed, and a control unit for controlling the image forming units to perform image formation by one of the image forming units in a portion belonging to that having a high spatial frequency within portions to be subjected to image formation in the prescribed color while performing image formation by overlapping a plurality of colors through at least two of the image forming units in a portion belonging to that having a low spatial frequency on the basis of a detection output from the spatial frequency detector. Method steps for improving image color reproducibility are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.