Image analysis – Histogram processing – For setting a threshold
Patent
1983-11-21
1986-07-15
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
250558, 356 12, 358 88, 358107, 364561, G06K 900
Patent
active
046010530
ABSTRACT:
A range-finding system comprising the hardwired video processing of two side-by-side TV stereo images of a scene to provide automatic, rapid, quantitative ranging to noncooperative objects. A single TV camera with appropriate optics to provide stereo inputs or, in a preferred embodiment, two TV cameras, provide the stereo images. Range is determined for any change of contrast in the common TV stereo scene to obtain the parallax displacement of corresponding object features with a three scan line delay of less than 200 microseconds. The video of the synchronized line scan of both cameras is stored as they are scanned, thus range can be determined with relative motion between the stereo camera and objects in the scene. Range is stored in on-board RAM's for each pixel of the TV scene and is available after three TV lines of delay. Range up-dating is continuous as the TV raster is scanned, or the range of a particular TV frame may be frozen for detailed study. Any part of the electromagnetic spectrum that can provide TV imagery can be used in the ranging system.
REFERENCES:
patent: 2786096 (1957-03-01), Palmer
patent: 3678190 (1972-07-01), Cook
patent: 3706493 (1972-12-01), Redmann
patent: 3961851 (1976-06-01), Gerharz
patent: 4158131 (1979-06-01), Probst
patent: 4335962 (1982-06-01), Di Matteo et al.
patent: 4480264 (1984-10-01), Duschl
Boudreau Leo H.
Couso Jose L.
Geib Richard G.
Grumman Aerospace Corporation
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