Two dimensional half-tone dot discrimination device
US4984283A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 6, 1988 |
| Grant date | Jan 8, 1991 |
| Priority date | — |
| Expiry date | May 6, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/40062
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image area discriminating device for automatically discriminating whether each of the scanned areas of an input image information has been previously subjected to halftone dotting treatment or not. The image area discriminating device may be assembled in a digital copier or like apparatuses. In order to effect better processing of images born on respective areas of the document depending on the characteristics of individual images, the image area discriminating device is used to discriminate precisely and automatically whether the individual images in respective image areas are halftone images or binary-coded images, particularly whether or not the images have been previously subjected to halftone dotting treatment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.