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Abstract:
The
mathematical model of the line structured light vision sensor is
established. A novel calibration method to determine all the primitive
parameters of the line structured light vision sensor with coplanar
reference object is proposed. Without striction to the moving of the
calibration reference object, all the parameters can be readily
calibrated on site with the calibrated feature points lying on more than
2 local world coordinate frames respectively. The global world
coordinates of the calibration feature points in the local world
coordinate frame can be computed through the three dimensional camera
coordinate frame. Therefore, it is guaranteed that the calibration state
is identical to the work state of the line structured light vision
sensor. The proposed approach greatly reduces the cost of the
calibration equipment and simplifies the calibrating procedure, so it
can promote the engineering applications of the line structured light
vision sensor handily. It shows that this method is practical in the
vision inspection applications by experiments.
Key words:
Structured
light Coplanar reference object Field calibration
Vision inspection
CLC No: TH132.4 TP391
国家杰出青年科学基金资助项目(50125518).
Received 20030605, received in revised form 20040110
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