Non-printing dot halftone patterns
US9819828B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 15, 2016 |
| Grant date | Nov 14, 2017 |
| Priority date | — |
| Expiry date | Mar 15, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/0094
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A special-purpose image processor can convert an electronic file into a bitmap by generating printing halftone dots within the bitmap based on locations of colors within the electronic file, and generating non-printing dots within the bitmap. A printing apparatus can print the bitmap, by not print marking materials where the non-printing dots are positioned within the bitmap. The special-purpose image processor can generate the non-printing dots within the bitmap by increasing the size of the printing halftone dots until they contact one another, or generating printing lines that connect the printing halftone dots to each other within the bitmap. Also, the special-purpose image processor can generate, as each printing halftone dot, a higher frequency pattern of printing dots, where the non-printing dots are generated to have a lower frequency pattern relative to that higher frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.