Hexagonal color pixel structure with white pixels

Details Hexagonal color pixel structure with white pixels Hexagonal color pixel structure with white pixels

2008-07-15

2008-07-15

Sajous, Wesner (Department: 2628)

Computer graphics processing and selective visual display system

Computer graphics processing

Attributes

C345S591000, C345S600000, C345S604000, C345S698000, C348S234000, C348S238000, C348S273000, C358S512000, C358S514000, C358S516000, C358S518000, C382S162000, C382S167000

Reexamination Certificate

active

11032540

ABSTRACT:
A digital color imager provides an extended luminance range, enabling a method for an easy transformation into all other color spaces having luminance as a component. White pixels are added to hexagonal red, green and blue pixels. These white pixels can alternatively have an extended dynamic range as described by U.S. Pat. No. (6,441,852 to Levine et al.). Especially the white pixels may have a larger size than the red, green, or blue pixels used. This larger size can be implemented by concatenation of “normal” size hexagonal white pixels. 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 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.

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Girish Tirunelveli, Richard Gordon. Stephen Pistorid, Comparison of Square-Pixel and Hexagonal-Pixel Resolution in Image Processing, [online], 2002 IEEE, [retrieved on Aug. 30, 2007]. Retrieved from the Internet: http:llieeexplore.ieee.orglie1517909121812/01013056.pdf, pp. 867-872.
Co-pending U.S. Patent App. DS-03-021, U.S. Appl. No. 10/859,797, filed Jun. 3, 2004, “Extended Dynamic Range in Color Imagers”, assigned to the same assignee as the present invention.
Co-pending U.S. Patent DS-04-056A, U.S. Appl. No. 11/032,538, filed Jan. 10, 2005, “Hexagonal Color Pixel Structure with White Pixels”, assigned to the same assignee as the current invention.

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