Area modulation printing apparatus
US5221971A · kind A · utility
14Cited by
40References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 21, 1990 |
| Grant date | Jun 22, 1993 |
| Priority date | — |
| Expiry date | Nov 21, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4055
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Printing apparatus and method particularly suited to provide a hardcopy of an image which is produced by medical imaging equipment or the like. The apparatus produces hardcopy consisting of pixels whose size can be changed by area modulation to suit image tonal content and detail while still maintaining a large number of gray levels per area modulation cell (pixel). Preferably, the same area modulation patterns representing pixel tonal values are used for printing pixels of different sizes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.