Target detection systems

Details Target detection systems Target detection systems

1989-06-13

1991-06-25

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 39, 358125, 358126, 250332, G06K 900

Patent

active

050274139

ABSTRACT:
A target detection system is provided for examining picture signals of a scene which may contain a target signal (15,16) to be detected against background signals (17,18). The image is divided into sub-images and sub-stores are provided one each for the sub-images (19). The values of a set of features, such as brightness, volume or quietness, of the background and target picture signals associated with each sub-image in the respective sub-store are calculated and stored. The statistical distributions of the background and target features in each sub-store to set a target decision threshold, in feature terms, for each sub-image are calculated. The feature values of an incoming picture signal in a sub-image are compared with the decision threshold in the associated sub-store to provide a target detection signal. Each sub-image threshold relates to the image status in that particular sub-image. A lower false alarm rate with a higher detection probability is provided.

REFERENCES:
patent: 3947833 (1976-03-01), Eckstein, Jr.
patent: 4497065 (1985-01-01), Tisdale et al.
patent: 4550435 (1985-10-01), Hayman
patent: 4739401 (1988-03-01), Sacks et al.
Proceedings of EUSIPCO-86 Sep. 1986, Signal Processing III: Theories and Applications, pp. 657 to 660.

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