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Novel multiresolution approach for an adaptive structured light system

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Quiroga Mellado, Juan Antonio and Vargas, Javier (2008) Novel multiresolution approach for an adaptive structured light system. Optical Engineering, 47 (2). ISSN 0091-3286

Official URL: http://dx.doi.org/10.1117/1.2857404




Abstract

3-D triangulation measurement systems with a fixed geometrical configuration have practical limitations that make them inappropriate for a wide variety of applications. The reason is that the ratio between the depth recovery error and the lateral extension is a constant that depends on the geometrical setup. Therefore, with a fixed triangulation setup, there is a tradeoff between field of view and depth resolution. As a consequence, measuring large areas with low depth recovery error necessitates the use of multiresolution techniques. In this work, we propose a multiresolution technique based on a camera-projector system previously calibrated and a second auxiliary camera that can move freely. The method consists of making first a measurement with a large field of view (coarse measurement). Afterwards, the geometrical configuration of the 3-D rig is changed to acquire a small field of view (fine measurement) that is referred to the original reference system and calibration parameters by means of the auxiliary camera. Using this method, a multiresolution reconstruction is possible without any optimization, registration, or recalibration process. Experimental results, which show a decrease of approximately one order of magnitude in the depth recovery error between fine and coarse measures, demonstrate the feasibility of the proposed method.


Item Type:Article
Additional Information:

© 2008 Society of Photo-Optical Instrumentation Engineers.

Uncontrolled Keywords:Phase, Calibration, Topometry, Surfaces, Errors
Subjects:Sciences > Physics > Optics
ID Code:22892
Deposited On:30 Sep 2013 07:45
Last Modified:14 Oct 2013 12:02

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