Apparatus and accompanying method for converting a bit mapped monochromatic image to a grey scale image using table look up operations
US5029107A · kind A · utility
44Cited by
7References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 31, 1989 |
| Grant date | Jul 2, 1991 |
| Priority date | — |
| Expiry date | Mar 31, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/40075
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Apparatus and an accompanying method for converting a relatively high resolution halftone bit-mapped monochromatic document, such as illustratively a halftone separation which exists in a CDPF print file, into a relatively low resolution continuous tone grey scale document which, when the latter is applied to a display screen of a video monitor having appropriate grey scale capability, would provide a readable displayed page, i.e. a "preview", that approximately depicts how the bit-mapped document would appear when printed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.