中文摘要：

为了减小相位测量过程中饱和引起的相位误差,更精确地重建物体的三维形貌,提出一种利用正反信号编码光栅图片降低因饱和引起的相位误差的新算法.算法通过编码正反信号的光栅图片,利用正反信号对应的光栅图片中像素点之间的对称性,修复饱和像素点的强度值,利用修复后的像素点强度值重建物体的三维形貌,从而降低饱和误差.通过仿真软件仿真及实验均证实本文算法的效用.实验结果表明：采用该算法的饱和误差的均方根值相对于传统测量方法减小了77.78%.

英文摘要：

In order to reduce the phase error caused by saturation in phase measuring profilometry （PMP）,a new algorithm that encoding the pattern with positive and negative signal was proposed in this paper.Firstly,encoding the pattern with positive and negative signal; secondly,repair intensity of saturated pixels with symmetry of patterns; lastly,to reconstruct object with repaired intensity.The proposed method can effectively reduce phase error,and the root mean square（RMS） values decrease 77.78% in experiment.