Tonal conversion method for pictures
US4811108A · kind A · utility
25Cited by
1References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 9, 1988 |
| Grant date | Mar 7, 1989 |
| Priority date | — |
| Expiry date | Mar 9, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4072
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An original continuous-tone picture is converted into a halftone picture, which is to be reproduced, on the basis of pictorial information from the original picture. The information is processed in such a way that the base density of a desired control point on the original picture and the halftone intensity of a corresponding control point on the halftone picture are correlated in accordance with a specific conversion formula.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.