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dc.contributorGeographic Sciences Laboratory.-
dc.contributor.authorBrooke, Robert K.-
dc.descriptionResearch note-
dc.descriptionAbstract: Given a photographic transparency with an amplitude transmittance function, that is equivalent to a functional representation of elevation information, for a particular geographic area, the slope information can be rapidly displayed using a coherent optical system and a one-dimensional differentiating filter. Implementation of this technique could provide an electro-optical system for the high speed conversion of elevation data to a slope map. It is concluded that slope map displays can be obtained from elevation function transparencies, though negative and positive slopes of the same magnitude are displayed identically. This is not expected to affect the utility of the output.-
dc.publisherU.S. Army Engineer Topographic Laboratories.-
dc.publisherEngineer Research and Development Center (U.S.)-
dc.relation.ispartofseriesResearch note (U.S. Army Engineer Topographic Laboratories) ; ETL-RN-74-9.-
dc.rightsApproved for public release; distribution is unlimited.-
dc.sourceThis Digital Resource was created from scans of the Print Resource.-
dc.subjectCoherent optical processing-
dc.subjectOptical data processing-
dc.subjectOptical differentiation-
dc.subjectSlope mapping-
dc.titleParallel optical processing to convert elevation data to slope maps. Phase I, Theoretical analysis-
Appears in Collections:Research Note

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