Patent · US Active

Real-time processing of grayscale image data

US8009931B2 · kind B2 · utility

44Cited by

26References

7Claims

0Family size

Assignee

Xerox Corporation · US

Inventors

Xing Li · Webster, US
Daniel A. Mohabir · Walworth, US
Roger L. Triplett · Penfield, US

Key dates

Filing date	Apr 3, 2009
Grant date	Aug 30, 2011
Priority date	—
Expiry date	Jun 11, 2029

Classification

Technology area (CPC H)Electricity
CPC primaryH04N1/3878
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

In a digital reproduction system incorporating a single pass scanner, accurate image processing results from processing a subset of grayscale image data. More specifically, scanlines that correspond to the leading edge of a document are stored and processed to detect skew and to obtain an appropriate correction. The lead edge correction is then applied to the entire grayscale image. Accordingly, the present systems and methods eliminate skew from grayscale images in real-time. The corrected image is rendered to binary and stored in electronic pre-collation memory and cropping, masking and other image editing operations can be performed on the binary image data before the image is printed.

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