Patent · US Active

System and method of contrast enhancement

US8218894B2 · kind B2 · utility

0Cited by

0References

12Claims

0Family size

Assignee

Himax Media Solutions, Inc. · TW

Inventor

Shing-Chia Chen · Danei, TW

Key dates

Filing date	Sep 10, 2009
Grant date	Jul 10, 2012
Priority date	—
Expiry date	Mar 25, 2031

Classification

Technology area (CPC G)Physics
CPC primaryG09G2320/066
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A system and method of contrast enhancement is disclosed. A contrast enhancement unit processes an input pixel to generate a contrast-enhanced pixel, and a delta unit subtracts the input pixel from the contrast-enhanced pixel, thereby resulting in a difference value. Multiple delayed difference values generated by a delay unit are low-pass filtered to generate a refined difference value. An adding unit adds back the refined difference value to the input pixel, thereby resulting in an output pixel that is contrast-enhanced without noise boost.

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