投影结构光空间位置和形状的标定方法研究

提出了结构光三维测量系统中投影结构光的空间位置和形状的多点拟合标定方法.在结构光三维测量系统有效视场范围内,空间靶平面多次改变并覆盖整个有效视场.利用投影矩阵与坐标变换关系,由投影结构光与空间靶平面的相截线来确定结构光在整个有效视场范围内的多个三维数据点,通过多点拟合,完成其空间位置和形状的标定.最后以多光片投影双目视觉三维测量系统中9条结构光的标定实验,验证了该方法的可行性和有效性.

Calibrating Location and Shape of Structured Lights Based on Multi-Point Fitting

Calibrating both the location and the shape of structured light in 3-D measurement system based on multi-point fitting method has been presented. In the field of view,the target plane has been rotated and shifted for times to cover the entire efficient measurement range. Then,an adequate number of 3-D points of each stripe intersected on the target plane in different positions have been acquired according to the projection matrix and the coordinate transform. Afterwards,the position and the shape of structured light can be calibrated by means of multi-point fitting. Finally,the feasibility and validity of this method have been confirmed by the experiment which involves the calibration of the nine structured lights in the 3-D binocular measurement system based on the multi-stripes projection.