Method for halftone image transformation, printing and halftone mask generation
US8289577B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 30, 2009 |
| Grant date | Oct 16, 2012 |
| Priority date | — |
| Expiry date | Apr 24, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4051
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A printing method for printing an input image. Firstly, a halftone mask is generated. The input image is transformed into a halftone image through the halftone mask. The halftone image is then output for printing. The halftone mask is an array of N elements, and the following steps generate the halftone mask. An initial array of N elements is first provided. Thereafter, a first value is selectively assigned to an element in the initial array to generate a first array. The second to the Nth arrays are then recursively generated based on the first array in the following steps. A minimum energy element in an Ith array is first determined. An (I+1)th value is then assigned to the minimum energy element to generate an (I+1)th array, wherein I denotes 2 to N−1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.