Method to improve a halftone by combining halftoning with algorithmic processing
US8237989B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 9, 2004 |
| Grant date | Aug 7, 2012 |
| Priority date | — |
| Expiry date | Oct 14, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/405
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention is directed to a system and method for halftone screening. A system for halftone screening includes means adapted to receive image data having a number of tonal levels representative of a continuous tone image. The system further includes a memory including a LUT having a number of alternative halftone cell arrangements for each tonal level. Each cell of the LUT consists of a number of device dots describing a particular gray value. For each gray value, there are several alternative cells with different arrangements of the same number of device dots. The LUT is configured with the cells of different arrangements in rows. The rows increase in the number of device dots; hence, each column describes halftone cells of increasing tonal values. The system then communicates the image data having a tonal level to the LUT, and randomly selects a halftone cell arrangement to generate a halftone output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.