Abstract
Plane-constraint-based calibration method for a galvanometric laser scanner
Highlights
Laser stripe vision sensors have been gaining wide acceptance in industry inspection due to fast acquisition time, a very simple structure, low cost, and robust nature
A galvanometric laser scanner is presented using a one-mirror galvanometer element as its mechanical device to drive the light stripe to sweep along the object to gather the point cloud on all the light stripes
Wei et al.[4] proposes an approach based on the invariance of double cross-ratio to estimate an arbitrary number of control points on the light stripe plane from at least three known world points with a 3D calibration target
Summary
Laser stripe vision sensors have been gaining wide acceptance in industry inspection due to fast acquisition time, a very simple structure, low cost, and robust nature. Wei et al.[4] proposes an approach based on the invariance of double cross-ratio to estimate an arbitrary number of control points on the light stripe plane from at least three known world points with a 3D calibration target. A flexible method is proposed to generate an arbitrary number of control points based on plane constraints by viewing a planar calibration target from multiple orientations. It is a very effective method; at least two different poses of the planar calibration target must be viewed by the camera. There are two alternates for the objective function
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