A Novel Calibration Method Based on Vanishing Points and Lines for Linear Structured Light Vision Sensor

Abstract

To meet the requirements of our own laboratory, the calibration method of linear structured light vision sensor based on the vanishing points and the vanihing lines is proposed. The concentric circles with a set of orthogonal diameters and known distance are designed as targets to calibrate the camera and linear structured light projector. Firstly, the orthogonal characteristics of the two vanishing points on orthogonal diameters are used to calibrate the internal and external parameters of the camera. Then the relationship between the normal vector of plane and the parameters in camera is applied to calibrate the normal vector of light plane. Finally, the forth parameter of light plane is obtained by using the coordinates of the known points in the target coordinate system. The experimental results show that the measurement average relative error of the sensor is 0.17%. It is proved that the linear structured light vision sensor with high accuracy and this is a feasible proposed calibration method.