Patent · US Active

Halftone screen

US8934142B2 · kind B2 · utility

0Cited by

8References

15Claims

0Family size

Assignee

Hewlett-Packard Indigo B.V. · NL

Inventors

Tamar Kashti · Nes Ziona, IL
Tal Frank · Nes Ziona, IL
Oren Haik · Nes Ziona, IL

Key dates

Filing date	Apr 30, 2013
Grant date	Jan 13, 2015
Priority date	—
Expiry date	Jul 26, 2033

Classification

Technology area (CPC H)Electricity
CPC primaryH04N1/4055
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A halftone screen may be used to transform a continuous tone image into a halftone image. Determining the halftone screen may include determining a first halftone tile for a first gray level, selecting pixel locations and increasing the intensity of pixels at the locations to activate the pixels to form a second halftone tile for a subsequent gray level. A filtered image may be generated from the second halftone tile, and pixels from the filtered image may be used to generate the halftone screen.

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