Gamma calibration

Details Gamma calibration Gamma calibration

2007-03-13

2007-03-13

Lee, Michael H. (Department: 2622)

Television

Image signal processing circuitry specific to television

Gray scale transformation

C348S674000, C348S722000

Reexamination Certificate

active

10656014

ABSTRACT:
An image processing system includes a frame store, a processing means and a monitor. The frame store stores a sequence of images from a film or video clip that will eventually be transferred to film for viewing in a theater. The image sequence is processed and possibly combined with other clips, resulting in changes to the color balance, intensity and contrast of the output clip. The image processing system, the monitor and the process of eventual transfer to film, have non-linear transfer characteristics, including gamma characteristics. These are combined in a single look-up table in a graphics card, so that images displayed on the monitor have an appearance matching that of the same images when viewed in the theater.

REFERENCES:
patent: 5049985 (1991-09-01), Outa
patent: 5353239 (1994-10-01), Kashiwagi
patent: 5483259 (1996-01-01), Sachs
patent: 6266103 (2001-07-01), Barton et al.
patent: 6441870 (2002-08-01), Rapaich
patent: 6671000 (2003-12-01), Cloutier

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