摘要
三步非等步相位测量轮廓术(PMP)算法在对采集的变形条纹图像光强的除法运算中忽视了分母为零的情况,导致在一部分区域出现截断相位与相位展开出错,致使重构三维面形的畸变与失真。为此,提出了一种改进的三步非等步PMP算法,修正了在除法运算中分母为零时的相位分布情况,避免了光强相除时导致的一部分盲点。通过计算机模拟与实验表明,新改进的算法有效地提高了测量精度,拓展了适用范围。
The algorithm with three unequal phase-shifting steps,neglects the condition that the denominator could be zero in the division operation about the intensity of the image,which leads to the incorrect wrapped phase and incorrect phase unwrapping in the certain region,even the reconstructed object will be misshapen or anamorphic.A novel improved three unequal step length phase-shifting algorithm is presented.The improved algorithm takes into account the phase distribution when the denominator is zero,so some blind spots can be avoided effectively.The computer simulations and experiments show that the improved algorithm can effectively improve the measurement accuracy,and branch out its application.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2010年第1期83-86,共4页
Journal of Optoelectronics·Laser
基金
国家"863"高技术研究发展计划资助项目(2007AA01Z333)
国家重大专项资助项目(2009ZX02304-08)
四川省学术和技术带头人培养基金资助项目(07GRC-01)
关键词
信息光学
三维重构
三步非定步长
光栅投影
三维测量
相位展开
information optics
3-D shape reconstruct
three undecided step length
grating projection
3-D measurement
phase unwrapping
