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Title

Accuracy of three-dimensional measurement using a single image

Author(s)

Iovenitti, Pio

Abstract

The accuracy of 3-D measurement using a single image of a four-point coplanar target of known size is studied. The factors that influence accuracy are analyzed and experimental techniques are used to establish their individual effect on accuracy. Experiments show that the four-point coplanar target has two solutions for real images and that mixing these causes large errors. It is concluded that when the target is approximately parallel to the image plane, the accuracy is significantly better compared to other target orientations, and that image distance is a critical factor affecting accuracy in the depth, while the effect of the other factors on accuracy is relatively insignificant. A new calibration technique is introduced that determines an average image distance over the image plane within the depth of focus and improves accuracy at close range.

Publication type

Journal article

Research centre

Swinburne University of Technology. Industrial Research Institute Swinburne

Source

Optical Engineering, Vol. 36, no. 1 (Jan 1997), pp. 47-55

Publication year

1997

FOR Code(s)

0205 Optical Physics;  0906 Electrical and Electronic Engineering

Keyword(s)

Image analysis;  Perspective four-point problem;  Three-dimensional measurement

Publisher

SPIE

ISSN

0091-3286

Publisher URL

http://dx.doi.org/10.1117/1.601126

Copyright

Copyright © 1997 Society of Photo-Optical Instrumentation Engineers. This paper was originally published in Optical Engineering (vol. 36, no. 1), and is available from: http://dx.doi.org/10.1117/1.601126. The published version of the paper is reproduced here in accordance with the copyright policy of the publisher. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.

Full text

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