Method and system in video image reproduction

Details Method and system in video image reproduction Method and system in video image reproduction

1990-06-26

1992-05-19

Weldon, Ulysses

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

324404, 340717, G09G 302

Patent

active

051152290

ABSTRACT:
A system and method for the accurate reproduction of the tone and luminance of a first video monitor screen includes, in one embodiment, a first video monitor and a second video monitor, each with a CRT screen. A gray scale test pattern is shown on both screens. The test pattern on each screen is measured using a spot photometer and the results are entered into a computer memory look-up table and compared, a tone-by-tone basis. A set of corrections is obtained for each tone of the gray scale. Those compensating corrections are used to adjust the luminance, on a pixel-by-pixel basis, of the second video screen of the second video monitor, so that the second screen is compensated to produce a gray scale which reproduces the tone and luminance values of the gray scale on the first screen.

REFERENCES:
patent: 3401331 (1968-09-01), Mussulman
patent: 3657550 (1972-04-01), Brown et al.
patent: 3725901 (1973-04-01), Lehari et al.
patent: 4955680 (1990-09-01), Froese-Peeck et al.
patent: 4962425 (1990-10-01), Rea
patent: 4989072 (1991-01-01), Sato et al.

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