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Proceedings Paper

Heterodyne range imaging as an alternative to photogrammetry
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Paper Abstract

Solid-state full-field range imaging technology, capable of determining the distance to objects in a scene simultaneously for every pixel in an image, has recently achieved sub-millimeter distance measurement precision. With this level of precision, it is becoming practical to use this technology for high precision three-dimensional metrology applications. Compared to photogrammetry, range imaging has the advantages of requiring only one viewing angle, a relatively short measurement time, and simplistic fast data processing. In this paper we fist review the range imaging technology, then describe an experiment comparing both photogrammetric and range imaging measurements of a calibration block with attached retro-reflective targets. The results show that the range imaging approach exhibits errors of approximately 0.5 mm in-plane and almost 5 mm out-of-plane; however, these errors appear to be mostly systematic. We then proceed to examine the physical nature and characteristics of the image ranging technology and discuss the possible causes of these systematic errors. Also discussed is the potential for further system characterization and calibration to compensate for the range determination and other errors, which could possibly lead to three-dimensional measurement precision approaching that of photogrammetry.

Paper Details

Date Published: 29 January 2007
PDF: 9 pages
Proc. SPIE 6491, Videometrics IX, 64910D (29 January 2007); doi: 10.1117/12.703674
Show Author Affiliations
Adrian Dorrington, Univ. of Waikato (New Zealand)
Michael Cree, Univ. of Waikato (New Zealand)
Dale Carnegie, Victoria Univ. of Wellington (New Zealand)
Andrew Payne, Univ. of Waikato (New Zealand)
Richard Conroy, Univ. of Waikato (New Zealand)

Published in SPIE Proceedings Vol. 6491:
Videometrics IX
J.-Angelo Beraldin; Fabio Remondino; Mark R. Shortis, Editor(s)

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