采用常规条纹投影与相位分析方法, 对动态物体, 尤其是空间存在孤立区域、分布不连续的动态物体进行3维面形测量时, 很难得到可靠的展开相位。为了解决这一问题, 提出一种用颜色编码正弦条纹光栅投影测量的新方法。该方法使用二级编码的颜色信息来标记待投影的正弦条纹, 从另一角度拍摄记录带有颜色信息的变形条纹图, 根据编码特征进行解码获取颜色级次来确定条纹级次,并指导截断相位的展开, 重建空间孤立动态物体的3维面形数据。结果表明, 该算法的编码稳定、解码方式可靠, 只需要拍摄1幅图就可以较好地重建空间孤立物体的3维面形。

When 3-D shapes of dynamic objects, especially with isolated area and discontinuous distribution, are measured with the traditional fringe projection and phase analysis method, it is difficult to get reliable expansion phase. A technique based on color-encoded sinusoidal fringe projection was proposed to solve the problem. The projected sinusoidal fringes were marked with two-level encoded color. After capturing the deformed fringe pattern, the fringe order was determined according to the color sequence based on the coded characteristics, and the cut-off phase was unwrapped. Finally, the 3-D shape of the dynamic object with isolate area was reconstructed. The results show the decoding method is stable and reliable. 3-D shape of the spatially isolated dynamic objects can be exactly reconstructed with only one shot.