Method for autotypical tonal value analysis
US4482923A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1981 |
| Grant date | Nov 13, 1984 |
| Priority date | — |
| Expiry date | Mar 31, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4051
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Method for producing a printing form by means of scanning a master and the recording surfaces in accord with a scanning raster or, respectively, a conforming recording raster upon employment of a random generator for the distribution of smallest points which are still printable to each raster field of the recording surface, whereby the plurality of said points which are still printable determines the respective tonal value and each raster field at the original side is resolved by means of fine-scanning into surface elements and the elements of approximately identical tonal value are combined to form sub-surfaces. Each raster field at the recording side is composed of surface elements and sub-surfaces, whereby the surface elements of the sub-surfaces at the recording side receive tonal values corresponding in terms of statistical mean, in that the sub-surfaces on the recording side, statistically distributed, are filled with a corresponding plurality of smallest points still printable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.