基于多视方程的高反光物体表面三维形貌测量

Three-Dimensional Shape Measurement of Shiny Surface Based on Multi-View Equation

双目结构光三维形貌测量技术在测量高反光物体的过程中,左右图像中对应物体表面的不同位置处出现过度曝光的现象,致使对应区域的相位数据无效。首先将投影系统作为反向相机并与双目系统共同组成多视系统,然后对物体表面的每一点进行多视系统匹配,接着通过调制度来判断每一像素对应相位的有效性,舍弃过曝光图像区域的像素以获得双视共线方程,最后由整体多视方程同时实现三维点云重建。该方法能够有效解决坐标系转换、多系统重建结果的数据冗余和融合误差等问题。实验结果表明,所提方法在500 mm×700 mm大小的视场范围内能够很好地对高反光物体进行完整的三维形貌测量。

In the process of measuring highly reflective objects using binocular structured light 3 D shape measurement technology,overexposure occurs at different positions of the corresponding object surface in the left and right images,resulting in invalid phase data in the corresponding area.First,the projection system as the reverse camera,and the multiple visual geometry system is composed of the binocular system and the projection system.Second,the more on every point on the surface of the object system matching.Then,the validity of the phase corresponding to each pixel is judged by modulation,and the two-view collinear equation is obtained by discarding the pixels in the over-exposed image region.Finally,the 3 D point cloud reconstruction is realized by global multi-view equation.This method can effectively solve the problems of coordinate system transformation,data redundancy and fusion error of multi-system reconstruction results.The experimental results show that the proposed method can effectively measure the 3 D shape of highly reflective objects in the field of view of 500 mm×700 mm.