Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1985-01-30
1987-09-22
Goldberg, E. A.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358105, 358138, H04N 712, H04N 718
Patent
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.
Wada Masahiro
Yamaguchi Hirohisa
Foster Patrick W.
Goldberg E. A.
Kokusai Denshin Denwa Co. Ltd.
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