A study on the 3-D measurement by using digital projection moire method

作者：Ryu Weon Jae^*; Kang Young June; Baik Sung Hoon; Kang Shin Jae

来源：Optik, 2008, 119(10): 453-458.

DOI：10.1016/j.ijleo.2006.12.016

• projection moire
• two-wavelength method
• phase-shifting technique
• 2 pi-ambiguity
• human bust

Moire topography method is a well-known non-contacting 3-D measurement method. Recently, the automatic 3-D measurement technique by moire topography has been developed in order to apply to the engineering and medical fields. The projection moire topography is very attractive because of its high measuring speed and high sensitivity. In this paper, using the two-wavelength methods of projection moire topography was investigated to measure the 3-D shape of an object with 2 pi-ambiguity problems. Rapid measurement can be accomplished by the synchronization between CCD camera and projector. The experimental results prove that the proposed scheme is capable of finding absolute fringe orders, so that the 2 pi-ambiguity problems can be effectively overcome so as to treat large step discontinuities in measured objects.

• 出版日期2008