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Proceedings Paper

Coherent Optics In Photogranmetry
Author(s): N. Balasubramanian
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Paper Abstract

Research on the application of coherent optical tech-niques to photogrammetric and mapping operations started during the early 60's. During the 60's most of these efforts were directed along two basic directions. On one hand various coherent optical processing techniques were being proposed and demonstrated to adlieve autocorrelation of the stereo-compilation procedure (Ref. 1) and on the other holography was being investigated for storing and displaying the information contained in the stereomodel (Refs. 2,3). In the recent past several investigations on the metric fidelity of the reconstructed holographic images have been made using conventional photogrammetric mensuratior techniques (Refs. 4, 5, 6). The potential application of holography for recording and reconstructing images for the purposes of mensuration in close range photogrammetry was the motivation behind these investigations. Results from these investigations clearly indicate that it is possible to retrieve reliable metric information about close range objects using holography. Also it has been shown that a photogrammetric quality stereomodel can be holographically stored and subsequency mapped using conventional photogram-metric mensuration techniques (Ref. 7). Holographic stereomodels of the focus image type permit reconstruction using extended white light sources. Advances made in optical memories, coherent optical pattern recognition techniques and optical detectors have all contributed to considerable progress in this area. Today applications of coherent optical techniques to mapping is an active area of research and multitude of research efforts are in progress around the country.

Paper Details

Date Published: 1 October 1974
PDF: 36 pages
Proc. SPIE 0045, Coherent Optics in Mapping, (1 October 1974); doi: 10.1117/12.953953
Show Author Affiliations
N. Balasubramanian, University of Rochester (United States)

Published in SPIE Proceedings Vol. 0045:
Coherent Optics in Mapping
N. Balasubramanian; Robert D. Leighty, Editor(s)

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