Apparatus for correcting for shading defects in video signals in

Details Apparatus for correcting for shading defects in video signals in Apparatus for correcting for shading defects in video signals in

1985-09-03

1989-04-18

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358163, 358217, 315371, H04N 9093, H04N 5228, H01J 2972

Patent

active

048231886

ABSTRACT:
A device for correcting shading in video signals which has conventionally occurred due to variations in speeds of the scanning spots. Speeds of the scanning spot are detected, and variations in these speeds are also detected. In addition, conventional-type digital correction values for correcting geometry and convergence errors are produced. Variations in speed are detected, and are digital-to-analog converted. A shading output correction signal indicative of a sweep speed variation is produced. This signal is added to the digital correction values to form a corrected correction value.

REFERENCES:
patent: 4285004 (1981-08-01), Morrison et al.
patent: 4326219 (1982-04-01), Griesshaber
patent: 4437110 (1984-03-01), Hunaut et al.
patent: 4485394 (1984-11-01), Ghaem-Maghami et al.
patent: 4499488 (1985-02-01), White et al.
patent: 4500916 (1985-02-01), Nabulsi
patent: 4549117 (1985-10-01), Takahashi et al.
patent: 4647822 (1987-03-01), Masuda et al.
patent: 4649421 (1987-03-01), Kodama et al.

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