Discussions on Phase-Reconstructing Algorithms for 3D Digitizing Structure-Light Profilometry
For the 3D digitizing structure-light profilometry, five kinds of phase reconstructing (PR) algorithms,including Schofields S-FFT (with 4 pairs of FFT & Inverse FFT operators) algorithm, Volkovs 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.
structure-light profilometry phase-shifting phase reconstructing
ZHU Yongjian LI Anhu YIN Shaohui CHEN Fengjun
National Engineering Research Center for High Efficiency Grinding, Hunan University, Changsha, Hunan School of Mechanical Engineering, Tongji University, Shanghai, 200092, China
国际会议
北京
英文
180-185
2008-11-06（万方平台首次上网日期，不代表论文的发表时间）