Apparatus for detecting television image movement

Details Apparatus for detecting television image movement Apparatus for detecting television image movement

1986-07-25

1988-10-18

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

H04N 718

Patent

active

047791314

ABSTRACT:
In an apparatus for detecting movement of a television image in response to frame difference data corresponding to a difference between present frame data and previous frame data, a video signal is divided into a plurality of segmental areas for each frame, a pixel or picture element is selected to represent each of the segmental areas, frame difference data are produced for each of the segmental areas by calculating differences in the position or coordinates of a pixel representative of a segmental area of a previous frame from the respective picture element of the corresponding segmental area in the present frame, and each of the calculated differences smaller than a predetermined magnitude, and which would be characteristic of a stationary background portion of the television image, is omitted from the frame difference data. This is effective to improve the movement vector detection accuracy. The apparatus has a circuit for zeroing the frame difference data, and thereby improving, the movement vector detection reliability when the number of the calculated differences omitted from the frame difference data exceeds a predetermined value.

REFERENCES:
patent: 4218703 (1980-08-01), Netravali
patent: 4307420 (1981-12-01), Ninomiya
patent: 4639782 (1987-01-01), Fujita
patent: 4661846 (1987-04-01), Kondo
patent: 4661853 (1987-04-01), Roeder
patent: 4663665 (1987-05-01), Tanaka

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