LINE-OF-SIGHT DETERMINATION FROM DIGITIZED IMAGERY

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.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00991112
• 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

Media Info

• Features: Figures; References;
• Pagination: p. 1151-56
• Serial:
  • Photogrammetric Engineering and Remote Sensing
  • Volume: 42
  • Issue Number: 9
  • Publisher: American Society for Photogrammetry and Remote Sensing
  • ISSN: 0099-1112

Subject/Index Terms

• TRT Terms: Correlation analysis; Digitized photography; Imagery; Line of sight; Stereoscopic models
• Old TRIS Terms: Stereo models
• Subject Areas: Data and Information Technology; Design; Highways;

Filing Info

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