新型三维视觉测量结构光平面标定方法

结构光平面标定是结构光三维视觉测量中的重要环节。传统的标定方法需要昂贵的设备，效率低下，步骤复杂。提出了一种新的三维视觉系统中结构光平面的标定方法。该方法仅使用一个简单的二维平面靶标，在保证靶标与结构光相交的前提下，靶标在摄像机可视范围内自由移动数个位置。对于移动到各个位置的靶标平面，分别建立对应的世界坐标系，并计算该世界坐标系与摄像机坐标系、图像坐标系的转换关系。通过处理算法，可以将每一个位置得到的结构光平面与靶标平面的交线方程统一到摄像机坐标系下。使用最小二乘法拟合多条交线可以标定出结构光平面在摄像机坐标系下的方程。实验证明该方法效率高，步骤简单，具有很好的通用性。

Novel Method for Structured Light Plane Calibration in Three-Dimensional Vision Measurement

The effects of curing electric field frequency on the electro-optic property of Polymer-Stabilized Cholesteric Texture (PSCT) is investigated. PSCT samples were prepared by means of polymerization induced phase separation (PIPS). By changing the curing electric field frequency, we can control the network morphology of PSCT and improve the electro-optic property. It was demonstrated that the diffusion of monomer and network morphology were related with curing electric field frequency. In addition, lower frequency promotes the diffusion of monomer and generally results in a open network with large void inside which often shows fast response,high closed transmittance, low threshold and low saturated voltage. On the adverse,higher frequency inhibits the diffusion and generally results in a closed network with smaller void inside which often shows slower response,lower transmittance,higher threshold and higher saturated voltage.