Patent · US Active

Extended dynamic range in color imagers

US8723995B2 · kind B2 · utility

10Cited by

27References

20Claims

0Family size

Assignee

Youliza, Gehts B.V. Limited Liability Company · US

Inventors

Detlef Schweng · Waiblingen, DE
Taner Dosluoglu · New York, US
Horst Knoedgen · Munich, DE

Key dates

Filing date	Jun 3, 2004
Grant date	May 13, 2014
Priority date	—
Expiry date	Jan 14, 2029

Classification

Technology area (CPC H)Electricity
CPC primaryH04N2209/045
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A digital color imager providing an extended luminance range, an improved color implementation and enabling a method for an easy transformation into another color space having luminance as a component has been achieved. Key of the invention is the addition of white pixels to red, green and blue pixels. These white pixels have either an extended dynamic rang as described by U.S. patent (U.S. Pat. No. 6,441,852 to Levine et al.) or have a larger size than the red, green, or blue pixels used. The output of said white pixels can be directly used for the luminance values Y of the destination color space. Therefore only the color values and have to be calculated from the RGB values, leading to an easier and faster calculation. As an example chosen by the inventor the conversion to YCbCr color space has been shown in detail.

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