Method of and device for estimating motion in a sequence of pict

Details Method of and device for estimating motion in a sequence of pict Method of and device for estimating motion in a sequence of pict

1986-11-24

1988-08-23

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358136, H04N 718, H04N 712

Patent

active

047664908

ABSTRACT:
Method of and device for estimating motion in a picture sequence, for use in compression of information to be transmitted or registered are disclosed. The method consists of: preserving the preceding picture with respect to the current picture; defining tree groups for the elements classified in fixed elements, moving elements and exposed elements, in which groups the elements are classified with a delay of L elements according to scanning of the picture; constructing a classification tree whose 3.sup.L branches correspond to the sequence of possible groups for the L successive elements of the picture sequence; associating with each branch, a displacement vector representative of the possible displacement of the element with respect to the picture or to the preceding line and, a cumulated distortion representative of the cumulative sum of the classification errors of the preceding elements; in accordance with this procedure relating to L elements, taking a decision concerning the group and concerning the vector of the element situated L elements earlier.

REFERENCES:
patent: 4218703 (1980-08-01), Natravali et al.
patent: 4245248 (1981-01-01), Natravali et al.
patent: 4371895 (1983-02-01), Koga
patent: 4691230 (1987-09-01), Kaneko et al.
patent: 4695882 (1987-09-01), Wada et al.
patent: 4703350 (1987-10-01), Hinman

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