Publication: Multiresolution approach based on projection matrices
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The Optical Society of America
Active triangulation measurement systems with a rigid geometric configuration are inappropriate tor scanning large objects with low measuring tolerances. The reason is that the ratio between the depth recovery error and the lateral extension is a constant that depends on the geometric setup. As a consequence, measuring large areas with low depth recovery error requires the use of multiresolution techniques. We propose a multiresolution technique based on a camera-projector system previously calibrated. The method consists of changing the camera or projector's parameters in order to increase the system depth sensitivity A subpixel retroprojection error in the self-calibration process and a decrease of approximately one order of magnitude in the depth recovery error can be achieved using the proposed method.
© 2009 Optical Society of America. We thank the Ministerio de Ciencia y Tecnología of Spain for the financial support of this work given by project DPI2005-03891 and the Spanish Ministry of Education for support under a FPU grant.
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