Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1984-08-01
1991-12-24
Buczinski, Stephen C.
Optics: measuring and testing
Range or remote distance finding
With photodetection
358109, 382 19, 382 21, 382 22, 382 25, 382 43, G01C 308, G06K 946
Patent
active
050746731
ABSTRACT:
A laser-based target discriminator system for discriminating desired objects from other objects and clutter in an image scene is disclosed. The system is operative to scan a pulsed laser beam a plurality of times across an image area, the scans covering different juxtaposed strip portions of the image area. Range differential signals are derived from the sensed information of successive laser pulsed echoes of each scan corresponding to the image elements thereof. From the range differential signalling, a binary image map of the image area is generated and converted into a second topological image map having index codes which are derived from predetermined groupings of the binary values of the first image map. Clusters of contiguous image elements are identified from the second image map based on the derived codes of the indices thereof. Desired clusters may be discriminated from the identified clusters based on measured predefined parameters thereof. More specifically, predetermined cluster parameters of at least one known object may be stored in the discriminator system for correlation with the measured parameters of the identified clusters to discriminate the cluster of clusters corresponding to the known object. The position and orientation of the desired object may also be determined by the measured predefined parameters of the clusters and the correlation process associated therewith.
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Hammer Jonathan B.
Logan Dale R.
Renwick William H.
Sowell Peggy J.
Buczinski Stephen C.
Sutcliff W. G.
Westinghouse Electric Corp.
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