Method and apparatus for producing a composite still picture of

Details Method and apparatus for producing a composite still picture of Method and apparatus for producing a composite still picture of

1975-11-20

1977-01-25

Britton, Howard W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

178DIG1, 340173CR, 273183R, 273 54D, 273DIG28, H04N 718, A63B 6900

Patent

active

040052613

ABSTRACT:
A storage-type image pick-up tube having a shutter associated therewith and a memory device are synchronously operated to produce a composite video signal which, when repeatedly applied to a video monitor or other image display device, provides a composite still picture of a moving object in an initial position and changes from such position at intervals over a period of time. The synchronous operations comprise a first step of opening the shutter while operating the pick-up tube to pick-up an image of the object in its initial position and to produce a corresponding first video signal which is simultaneously stored in the memory device, a second step of closing the shutter while reading-out any signal previously stored in the memory device and storing the read-out signal in the pick-up tube, a third step of opening the shutter while operating the pick-up tube to pick-up an image of the object in a subsequent position and to produce a corresponding signal from which the signal then stored in the pick-up tube is subtracted for providing a resultant signal which is stored in the memory device in superposed relation to the signal previously stored in the memory device, and repeating the second and third steps cyclically at intervals for the duration of the prescribed period of time.

REFERENCES:
patent: 2943141 (1960-06-01), Knight
patent: 3336585 (1967-08-01), Macouski
patent: 3623027 (1971-11-01), Williams
patent: 3894181 (1975-07-01), Mistretta

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