System for detecting vector of motion of moving objects on pictu

Details System for detecting vector of motion of moving objects on pictu System for detecting vector of motion of moving objects on pictu

1985-02-07

1987-01-13

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358105, 358160, 358167, H04N 521

Patent

active

046368620

ABSTRACT:
A system for detecting the vector of motion of a moving object on a picture screen, in which there is prepared, in addition to a picture memory for storing picture signals, a background memory for storing background picture signals. From the background memory, picture elements of a block #0b which lies at the same position on the screen as the current input block are read out and an inter-block difference B(#0', #0b) between the current input block #0' and the block #0b is calculated. If this gives rise to an uncovered background, then the above inter-block difference B(#0', #0b) between the picture memory and the background memory becomes smaller than any other inter-block differences (that is, the degree of similarity becomes the highest), and consequently, it is possible to judge that a new background portion has appeared. Incidentally, in connection with the background portion except the uncovered background, for example, a portion A' data in the picture memory and data in the background memory become identical, excepting noise components. Accordingly, in connection with this portion, the contents of the block #0 in the picture memory and the block #0b in the background memory differ little from each other, so that even if either the inter-block difference B(#0', #0) or B(#0', #0b) is chosen as a result of comparison of their magnitudes, substantially no characteristic deterioration is caused. For instance, in case of using the result of detection of movement for the movement-compensated predictive coding operation, the coding efficiency is hardly affected, even if either the block #0 or #0b is used for prediction.

REFERENCES:
patent: 4090211 (1978-05-01), Connor
patent: 4296436 (1981-10-01), Achiha
patent: 4361853 (1982-11-01), Remy
patent: 4367490 (1983-01-01), Riederer
patent: 4506382 (1985-03-01), Hada

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