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Proceedings Paper

Mars Viking 1975 Lander Interactive Computerized Video Stereophotogrammetry
Author(s): Sidney Liebes Jr.; Arnold A. Schwartz
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Paper Abstract

An interactive computerized video stereophotogrammetry system has been developed to quantify the topography recorded by the Mars Viking 1975 lander cameras. The system has supported all surface sample acquisitions and enabled the mapping of the two landing sites out to the remote limits of ranging capability. Returned imaging data is loaded into a time-shared computer system, driven to a pair of high resolution video monitors, and viewed through a scanning stereoscope. A three-space mark, characterized by a pair of coupled dot cursors on the video monitors is moved under trackball control via the computer. The mark may be landed on features of interest and the three-space coordinates established. The mark may be constrained in any desired manner, e.g., to a vertical or horizontal plane in the lander/Martian three-space. The photogrammetrist moves the mark along his perception of the intersection of the surface of constraint with the Martian relief. As the mark is moved, its track may be recorded on the video displays. The three space path is stored in the computer. Data products include vertical profile plots, contour maps, stereo map representations, and photoproducts of the scene with overlayed profiles and contours. The monitors are slaved for parallel viewing. The system is fast, accurate, and versatile.

Paper Details

Date Published: 29 December 1977
PDF: 2 pages
Proc. SPIE 0120, Three-Dimensional Imaging, (29 December 1977); doi: 10.1117/12.955738
Show Author Affiliations
Sidney Liebes Jr., Stanford Medical Center (United States)
Arnold A. Schwartz, California Institute of Technology (United States)

Published in SPIE Proceedings Vol. 0120:
Three-Dimensional Imaging
Stephen A. Benton, Editor(s)

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