Unsynchronized multispectral video filtering system with filter

Details Unsynchronized multispectral video filtering system with filter Unsynchronized multispectral video filtering system with filter

1988-02-08

1989-10-31

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 98, 358151, H04N 907

Patent

active

048781096

ABSTRACT:
A video system for exposing a video camera to a field of view through a sequence of different filter elements. A position detection system is employed in order to identify which filter element is in the field of view without requiring synchronization between the filter elements and the camera system. The filter elements are rotated on a wheel in front of the camera lens by an unsynchronized motor, and wheel position is detected and used to trigger a frame buffer so that it fills with signals from a camera view through a particular unitary filter. The position detection system may include a coded marking on the wheel which is detected by a separate sensor or detection in the signal stream from the camera, or it may include means for sensing the filter characteristic in the video signal itself. A controller provides a request of video signals for a particular filter characteristic which operates in synchronism with the position sensor.

REFERENCES:
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patent: 3600504 (1971-08-01), Reilly
patent: 3654385 (1972-04-01), Flagle
patent: 3821793 (1974-06-01), Carson
patent: 4242703 (1980-12-01), Tsuboshima et al.
patent: 4593313 (1986-06-01), Nagasaki et al.
patent: 4713683 (1987-12-01), Fujimori et al.
patent: 4727418 (1988-02-01), Kato et al.

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