Television – Image signal processing circuitry specific to television – Gray scale transformation
Reexamination Certificate
2006-09-19
2006-09-19
Yenke, Brian P. (Department: 2622)
Television
Image signal processing circuitry specific to television
Gray scale transformation
C348S672000, C348S673000, C348S674000, C348S678000, C345S589000, C345S684000
Reexamination Certificate
active
07110046
ABSTRACT:
A method for dynamically adjusting video brightness performs histogram equalization on a video YUV brightness/color signal to generate an equalization brightness curve. The brightness of each pixel is compared with every pixel of the video frame before and after histogram equalization to generate a comparison difference value. The brightness of the pixel is adjusted so that the brightness difference after adjustment won't be larger than three times of the comparison difference value and won't be smaller than a fourth of the comparison difference value. The brightness of each pixel before and after histogram equalization is compared, one by one, to generate a brightness difference value. The brightness difference value is adjusted so that the brightness difference after adjustment won't be larger than a largest brightness value and won't be smaller than a smallest brightness value. The brightness of each video frame can be properly adjusted to accomplish clearer displaying effect.
REFERENCES:
patent: 5862254 (1999-01-01), Kim et al.
patent: 5963665 (1999-10-01), Kim et al.
patent: 6049626 (2000-04-01), Kim
patent: 6075890 (2000-06-01), Park
patent: 6078686 (2000-06-01), Kim
patent: 6101294 (2000-08-01), McCaffrey et al.
patent: 6259472 (2001-07-01), Park
patent: 6507372 (2003-01-01), Kim
patent: 6687400 (2004-02-01), Szeliski
patent: 6741736 (2004-05-01), Jaspers
patent: 6826310 (2004-11-01), Trifonov et al.
patent: 7003153 (2006-02-01), Kerofsky
patent: 2003/0161549 (2003-08-01), Lei et al.
patent: 2004/0213478 (2004-10-01), Chesnokov
patent: 2005/0100242 (2005-05-01), Trifonov et al.
patent: 2005/0213125 (2005-09-01), Smith et al.
Huang Hochao
Lin Pin-Ting
Cyberlink Corp.
Thomas, Kayden, Horstemeyer & RIsley
Yenke Brian P.
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