Patent · US Active

Image processing method for reducing imaging artifacts

US7936479B2 · kind B2 · utility

6Cited by

6References

9Claims

0Family size

Assignee

AGFA GRAPHICS NV · BE

Inventors

Peter Bracke · Mortsel, BE
Eddy Debaere · Deinze, BE
Joris Van Garsse · Mullem, BE

Key dates

Filing date	Jun 2, 2006
Grant date	May 3, 2011
Priority date	—
Expiry date	Mar 30, 2028

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB41J2202/20
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

An image processing method includes a step of converting halftoned pixels of an image to be printed represented at a first lower tonal resolution into pixels represented at a second higher tonal resolution. Image processing is used on the pixels having a higher tonal resolution to reduce image quality artifacts when the pixels are printed at the first lower tonal resolution. In a preferred embodiment, the image processing includes error diffusion of a sigma delta modulation.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.