Discussions on phase-reconstructing algorithms for 3D digitizing structure-light profilometry |
| |
Authors: | Yongjian Zhu Anhu Li |
| |
Institution: | a School of Mechanical & Automotive Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China b School of Mechanical Engineering, Tongji University, Shanghai 200092, China c School of Science, Zhejiang University of Science and Technology, Hangzhou 310023, China |
| |
Abstract: | For the 3D digitizing structure-light profilometry, five kinds of phase reconstructing (PR) algorithms, including Schofield's S-FFT (with 4 pairs of FFT & Inverse FFT operators) algorithm, Volkov's deterministic V-FFT PR algorithm (with only one pair of FFT operators and one Inverse FFT operator), quality-guided (QG) method, weighted least-square (WLS) method and a proposed Discrete-Cosine-Transform-Based (DCT-B) algorithm have been implemented and discussed in detail. The computer-simulated data show that the WLS and V-FFT enjoy the least phase error, but the QG algorithm achieves the trade-off between reliability and computational time. The S-FFT together with V-FFT method almost fails to deal with the experimental data with abrupt phase variance. Among the other three algorithms, the DCT-B algorithm shows its advantage over QG and WLS algorithms in settling these problems. Considering phase error and computational time, it could win the priority in PR. The experimental results also demonstrate that the proposed DCT-B algorithm could be firstly considered in the application of structure-light profilometry, especially to process the abrupt-phase maps. |
| |
Keywords: | Structure-light profilometry Phase-shifting Phase reconstructing |
本文献已被 ScienceDirect 等数据库收录! |
|