Movement estimation system for video signals using a recursive g

Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry

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358105, 358138, H04N 712, H04N 718

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active

046958827

ABSTRACT:
A movement of a small picture block in a frame of video signals is provided by recursively applying a gradient method to a picture block in a present frame and a preceding frame to provide a series of sub-movements until said sub-movement decreases less than a predetermined value, and the resultant movement is obtained by the sum of the sub-movements. The present invention provides high accuracy in estimation of movement of a block in a picture as compared with a conventional gradient method, and is attractive in hardware implementation.

REFERENCES:
patent: 4218703 (1980-08-01), Netravali et al.
patent: 4232338 (1980-11-01), Netravali et al.
patent: 4383272 (1983-05-01), Netravali et al.
"Motion-Compensated Television Coding", part 1, The Bell System Technical Journal, vol. 58, No. 3, Mar. 1979, pp. 631-635.
"Estimating the Velocity of Moving Images in Television Signals", Limb, et al., Computer Graphics and Image Processing, (1975), 4, pp. 311-327.

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