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Proceedings Paper

Terrain reconstruction from widely separated images
Author(s): Howard J. Schultz
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Paper Abstract

When a terrain elevation map is computed from widely separated images the perspective distortion may result in a large number of false matches and poor reconstruction accuracy. This paper describes three image matching algorithms designed specifically to process images taken with large base-to-height ratios. They include a new match score, a subpixel interpolation scheme, and a multi-resolution unwarping technique. The algorithms are incorporated into a stereo analysis package and the system is tested by processing a single pair of high altitude images with a base-to-height ratio of 0.63 and a sequence of simulated images with base-to-height ratios that varied between 0.25 and 2.25. Analysis of the simulated data show that when these techniques are implemented the reconstruction accuracy remains independent of the base-to-height ratio.

Paper Details

Date Published: 5 July 1995
PDF: 11 pages
Proc. SPIE 2486, Integrating Photogrammetric Techniques with Scene Analysis and Machine Vision II, (5 July 1995); doi: 10.1117/12.213111
Show Author Affiliations
Howard J. Schultz, Univ. of Massachusetts/Amherst (United States)

Published in SPIE Proceedings Vol. 2486:
Integrating Photogrammetric Techniques with Scene Analysis and Machine Vision II
David M. McKeown Jr.; Ian J. Dowman, Editor(s)

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