Halftone generation system and halftone generation method
US6930800B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 2, 1999 |
| Grant date | Aug 16, 2005 |
| Priority date | — |
| Expiry date | Sep 2, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4058
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
All threshold data applied to processing is read into a register so that threshold data read from threshold matrix memory can be recycled until the end of a scanning line for processing, and is selectively output to a plurality of comparison means for executing parallel comparison processing. The threshold data set in the register is shifted in order for repetitive use. The threshold data of the next scanning line is read into the register during the comparison processing, and upon completion of processing of one scanning line, comparison processing on the next scanning line is executed as pipeline processing. Threshold data read from the memory needs to be executed only once for each scanning line for processing, and threshold data can also be read during halftone data generation of the preceding line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.