The basic notion of regarding the photograph as the primary data base is used to develop three single-model techniques for determining whether line-of-sight exists between any two points within a stero model. Two of the techniques use digital imagery. Only one of the methods is analyzed numerically. Matching processes using correlation methods are applied to a pair of digital images to determine the line-of-sight of two points 1,200 meters apart. A microdensitometer with comparator capabilities created the digital gray shade data. The third technique, a visual one, requires that the model be set up in a stereoscopic device.

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  • Corporate Authors:

    American Society of Photogrammetry

    105 North Virginia Avenue
    Falls Church, VA  United States  22046
  • Authors:
    • Crombie, M A
    • Ackerman, D L
  • Publication Date: 1976-9

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Filing Info

  • Accession Number: 00142583
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Dec 15 1976 12:00AM