13 June 2005 New method of structure light measurement system calibration based on adaptive and effective evaluation of 3D-phase distribution
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Abstract
In the paper a new method for scaling of phase values into (x,y,z) co-ordinates supporting methods with absolute phase determination e.g. fringe projection / Gray code techniques is presented. It is based on calculation of characteristic polynomials describing relationships between phase values and real (x,y,z) co-ordinates in measurement volume. Coefficients of these polynomials are calculated on the base of phase distribution on known 2D-calibration model positioned manually in several unknown positions inside measurement volume. It introduces new way of calibration by two step process. First, it calculates exact positions of model on the base of its phase distributions and secondly it evaluates coefficient of polynomials. Applicability of the method described is proven by calibration of 3D shape measurement system based on unknown, commercially available projection and detection systems with unknown parameters of imaging optics and geometrical set-up. Exemplary measurement result of freeform object is presented.
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Robert Sitnik, Robert Sitnik, } "New method of structure light measurement system calibration based on adaptive and effective evaluation of 3D-phase distribution", Proc. SPIE 5856, Optical Measurement Systems for Industrial Inspection IV, (13 June 2005); doi: 10.1117/12.613017; https://doi.org/10.1117/12.613017
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