Similar model assisted phase unwrapping for three-dimensional measurement based on fringe projection

Yong Li; Xiaosong Zhang; Guanghui Zhang; Renjie Song; Xiaolin Ying; Dongya Chu

doi:10.1117/12.2616355

8 July 2022 Similar model assisted phase unwrapping for three-dimensional measurement based on fringe projection

Yong Li, Xiaosong Zhang, Guanghui Zhang, Renjie Song, Xiaolin Ying, Dongya Chu

Proceedings Volume 12282, 2021 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems; 1228213 (2022) https://doi.org/10.1117/12.2616355
Event: 2021 International Conference on Optical Instruments and Technology, 2022, Online Only

Abstract

A novel algorithm for phase unwrapping with the assistance of similar model of scene is proposed. The major steps of proposed algorithm are as follows. (1) Obtain wrapped phase and modulation of fringe by phase shift method. (2) Extract feature points of scene from background of fringe. (3) Obtain scaling and motion parameters of model from 2D and 3D coordinates of feature points. (4) Calculate reference phase from model by motion parameter and shape of model according to camera model. (5) Retrieve absolute phase by wrapped phase of scene and reference phase. The experimental results are demonstrated. If the similar model of scene is available, the proposed algorithm is efficient for phase unwrapping in phase measurement profilometry without additional patterns, even though the scene contains isolated parts.

Citation Download Citation

Yong Li, Xiaosong Zhang, Guanghui Zhang, Renjie Song, Xiaolin Ying, and Dongya Chu "Similar model assisted phase unwrapping for three-dimensional measurement based on fringe projection", Proc. SPIE 12282, 2021 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems, 1228213 (8 July 2022); https://doi.org/10.1117/12.2616355

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