Automatic registration control system for color television camer

Details Automatic registration control system for color television camer Automatic registration control system for color television camer

1983-02-03

1985-02-12

Murray, Richard

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 909

Patent

active

044994885

ABSTRACT:
A system for automatically setting up a color television camera. Register error is detected by correlating the times of occurrence of level transitions in two video signals. A unipolar pulse is provided in response to a level transition in one of the video signals, and a pulse having a positive and a negative lobe is provided in response to a level transition in the other of the video signals. The two pulse signals are multiplied. The product of the two pulse signals is integrated to produce a signal whose amplitude and polarity varies with register error. A microprocessor control system detects size and centering errors by measuring register error at different spots on the raster. Before correcting setup errors, the microprocessor verifies that there are adequate level transitions in the imaged scene by methodically adjusting the setup controls over a range of values and noting whether the measured register or size errors change accordingly.

REFERENCES:
patent: 3621122 (1971-11-01), Hipwell
patent: 3692918 (1972-09-01), Olson et al.
patent: 3764735 (1973-10-01), Dieter-Schneider et al.
patent: 3830959 (1974-08-01), Dischert et al.
patent: 3925812 (1975-12-01), Blom et al.
patent: 4234890 (1980-11-01), Astle et al.
patent: 4310855 (1982-01-01), Holzgrafe

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