Real-Time Shape Measurement by Unwrapping Method Using Aliasing
We previously proposed a real-time shape measurement method using two-component synthesis grating projection. In the method, phase unwrapping of the projected grating is performed by using aliasing of the Fourier spectrum of the grating images. It requires only 5 images obtained for one-cycle phase-shifting. Each phase in the two-component can be extracted from only 5 phase-shifted grating images. In this paper, we propose a real-time shape measurement system. The theory, the algorithm for the analysis and the experimental results are shown.
Soon-Bok Lee and Yun-Jae Kim
M. Fujigaki et al., "Real-Time Shape Measurement by Unwrapping Method Using Aliasing", Key Engineering Materials, Vols. 326-328, pp. 31-34, 2006