Method of effecting a motion filtering for slow targets, and an

Details Method of effecting a motion filtering for slow targets, and an Method of effecting a motion filtering for slow targets, and an

1993-12-29

1994-10-11

Harvey, Jack B.

Boots, shoes, and leggings

324160, 348149, 348169, 348208, 348416, G01S 506

Patent

active

053553268

ABSTRACT:
A method of producing a motion filter for detecting point targets moving slowing within a sequence of readjusted binary images, these images corresponding to a history at the instant n-1, denoted Hist n-1 (1), including target trajectories and alarms. This method includes: A) an initializing step having a sub-step of accumulating results arising from an extractor and which consist of the coordinates hj of the start-points of trajectories and of the coordinates Ci in Hist(n-1) (1); B) a step for constructing the history at the following instant n, denoted Hist N (2), having two loops: B1) a first loop for producing either the lengthening or the initializing of the trajectories depending on the alarms received; B2) a second loop for producing either the lengthening or the destruction of the trajectories not depending on the alarms received; C) a step for detecting the targets from observation of Hist n (2).

REFERENCES:
I. K. Sethi et al., "Finding Trajectories of Feature Points in a Monocular Image Sequence", IEEE Transactions on Pattern Analysis and Machine Intelligence, vol. PAMI-9, No. 1, Jan. 1987, pp. 56-73.
V. S. S. Hwang, "Tracking Feature Points in Time-Varying Images Using an Opportunistic Selection Approach", Pattern Recognition, vol. 22, No. 3, 1989, pp. 247-256.

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