Tonal conversion method for pictures
US4956718A · kind A · utility
23Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 8, 1989 |
| Grant date | Sep 11, 1990 |
| Priority date | — |
| Expiry date | Aug 8, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4072
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An original picture having a standard or non-standard picture quality is converted into a halftone picture, which is to be reproduced, on basis of pictorial information. The density information on the individual density characteristic curve is adjusted to the density information on the standard density characteristic curve. The adjusted density information is then 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.