Image data comparison circuit for rangefinders

Details Image data comparison circuit for rangefinders Image data comparison circuit for rangefinders

1984-05-31

1987-02-03

Buczinski, Stephen C.

Optics: measuring and testing

Range or remote distance finding

With photodetection

354403, 354408, G01C 300, G01C 500, G03B 300

Patent

active

046406131

ABSTRACT:
In the particular embodiments of the invention disclosed herein, an image data comparison circuit receives digital image signal trains from two light sensor arrays of a rangefinder and compares the signals in the signal trains while they are being shifted with respect to each other. In one embodiment a set of coincidence detectors compares each signal in one signal train with all of the signals in one segment of the other image train and the number of coincidence detections by each detector is accumulated as the signal trains are cycled through corresponding shift registers. Another embodiment includes coincidence detectors for comparing all of the signals in corresponding segments of the two signal trains simultaneously.

REFERENCES:
patent: 3945023 (1976-03-01), Stauffer
patent: 4189232 (1980-02-01), Asano et al.

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