Image signal processing apparatus
US4517605A · kind A · utility
24Cited by
7References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 16, 1982 |
| Grant date | May 14, 1985 |
| Priority date | — |
| Expiry date | Feb 16, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4055
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image signal processing apparatus provides both improved tonal rendition and resolving power by utilizing a dither matrix in which dither data indicating threshold values are formed by a dither matrix divided into plural sub-dither matrices for providing dither data arranged in a low spatial frequency and such dither data are compared with the density signals from an image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.