Image processing apparatus for converting a color image into a pattern image with a synthesized gradation image increasing in density closer to contour portions of the pattern image
US5485288A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1992 |
| Grant date | Jan 16, 1996 |
| Priority date | — |
| Expiry date | Feb 28, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/40012
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image processing apparatus for converting color images into monochromatic pattern images. The image processing apparatus includes: means for detecting the area of a color image; means for converting a color image into a monochromatic pattern image; and control means for varying such image processing in accordance with the result of detection made by the means for detecting the area. When a thin line is detected in a color area, the method of processing is determined based on the width of the detected thin line. For example, when the width of the thin line is smaller than a predetermined value, the area of such thin line may be outputted as a plain image instead of a pattern image so that it may easily be seen or recognized. The contour of a color area may be made conspicuous by combining a plain image and a pattern image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.