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Fast calibration method of multiple line structured light visual sensor

InactiveCN103411553AEasy to completeSuitable for on-site calibrationUsing optical meansVirtual spaceBack calculation
The invention belongs to the technical field of visual detection, and provides a calibration method which is convenient and fast to use and accurate. The fast calibration method aims to make full use of characteristics of the multiple line structured light visual sensor in the aspect of three-dimensional shape measurement so as to be applied to on-line three-dimensional detection of industrial products. According to the technical scheme, the fast calibration method of the multiple line structured light visual sensor comprises the steps that a three-dimensional measurement model of the multiple line structured light visual sensor is built, wherein a measurement coordinate system is set in a world coordinate system where virtual space feature points are calibrated through the three-dimensional measurement model; according to the measurement model, due to the adoption of the Zhang calibration method that visual angles are not determined, a plurality of coplanar positions are placed through the visual sensor (namely, a plane target) to acquire virtual space feature point arrays so as to carry out camera calibration; three-dimensional point arrays on each light plane are acquired according to camera calibration results and the cross ration invariability theory to finish light plane calibration; the three-dimensional shape of a measured object is worked out in a back calculation mode through the measurement model. The fast calibration method of the multiple line structured light visual sensor is mainly used for visual detection.
Owner:TIANJIN UNIV
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