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dc.contributorGeographic Sciences Laboratory.
dc.contributor.authorBrooke, Robert K.
dc.date.accessioned2016-03-18T14:35:35Z
dc.date.available2016-03-18T14:35:35Z
dc.date.issued1974-10
dc.identifier.urihttp://hdl.handle.net/11681/5079
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.description.provenanceMade available in DSpace on 2016-03-18T14:35:35Z (GMT). No. of bitstreams: 1 ETL-RN-74-9.pdf: 744193 bytes, checksum: 050d15bf0170826afc2ada983a033371 (MD5) Previous issue date: 1974-10en
dc.publisherU.S. Army Engineer Topographic Laboratories.
dc.publisherEngineer Research and Development Center (U.S.)
dc.relationhttp://acwc.sdp.sirsi.net/client/en_US/search/asset/1045536
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
dc.typeDOCUMENT


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