Accession Number : AD0778790
Title : Holographic Stereogram Display Techniques for the Viewing and Mensuration of Stereo Photogrammetric Imagery.
Descriptive Note : Final rept. 1 Nov 72-31 Oct 73,
Corporate Author : NORTHROP RESEARCH AND TECHNOLOGY CENTER HAWTHORNE CALIF
Personal Author(s) : McCrickerd,J. T.
Report Date : 30 NOV 1973
Pagination or Media Count : 59
Abstract : Holographic stereograms, holograms of stereo-pair aerial-photos, are measured to determine geographical coordinates of terrain features. The holograms are stereoscopically viewed and measured in three dimensions through a conventional binocular-eyepiece microscope. A pair of cross-hair reticles in the eyepieces give the illusion of a floating cursor which, to facilitate mensuration, can be moved throughout the breadth and depth of the 3-D terrain display. Microscope dial readings are interpreted by geometrical formulae to yield coordinates of terrain features. Measurements are made relative to reference points, which appear as a three-dimensional array in the display. Aerial photo distortions are compensated by proper placement of the points. (Author)
Descriptors : *Stereophotogrammetry, *Holograms, Aerial photography, Holography, Terrain, Stereoscopic display systems
Subject Categories : Cartography and Aerial Photography
Distribution Statement : APPROVED FOR PUBLIC RELEASE