Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7132393 | Optics and Lasers in Engineering | 2016 | 13 Pages |
Abstract
This paper suggests a novel absolute empirical calibration method for a multi-sensor fringe projection system. The optical setup of the projector-camera sensor can be arbitrary. The term absolute calibration here means that the centre of the three dimensional coordinates in the resultant calibrated volume coincides with a preset centre to the three-dimensional real-world coordinate system. The use of a zero-phase fringe marking spot is proposed to increase depth calibration accuracy, where the spot centre is determined with sub-pixel accuracy. Also, a new method is proposed for transversal calibration. Depth and transversal calibration methods have been tested using both single sensor and three-sensor fringe projection systems. The standard deviation of the error produced by this system is 0.25Â mm. The calibrated volume produced by this method is 400Â mmÃ400Â mmÃ140Â mm.
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Authors
Munther Gdeisat, Mohammad Qudeisat, Mohammed AlSa׳d, David Burton, Francis Lilley, Marwan M.M. Ammous,