Halftone image processing using a dither matrix with a consecutive order and shifted from an adjoining block in a main scan direction
US7542169B2 · kind B2 · utility
1Cited by
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21Claims
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Key dates
| Filing date | Nov 14, 2005 |
| Grant date | Jun 2, 2009 |
| Priority date | — |
| Expiry date | Jul 7, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/405
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image processing apparatus comprising a halftone processing section which executes a halftone process for input image data, wherein the halftone processing section executes the halftone process, by using a dither matrix, the order of producing the dots in the halftone process is consecutive in a main scanning direction, in the pixel block, and the starting position of producing the dots in the pixel block is shifted in the main scanning direction by no less than two dots from the starting position of the adjoining pixel block in the sub scanning direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.