Generation of halftone overlays for combination with halftoned images
US5715382A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | May 2, 1996 |
| Grant date | Feb 3, 1998 |
| Priority date | — |
| Expiry date | May 2, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/3872
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The generation of personalised documents, or documents including variable data, may require one or more varying overlay images to be printed on top of a background image. In order to avoid the generation of the background image for each document separately, a method is provided to store the background image permanently and to merge it with the overlay images just before printing. A transparency notion may be introduced to avoid masking of the background image by horizontally oriented rectangular overlays. The overlay image and the background image may be generated by a process of multilevel halftoning, suitable for printing by an electrophotographic printing device, using colored toner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.