颜色编码正弦条纹实现孤立动态物体3维测量

摘要

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 .%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。