Absolute phase retrieval based on the sinusoidal codewords

Haihua An; Yiping Cao

doi:10.1117/12.2652179

15 December 2022 Absolute phase retrieval based on the sinusoidal codewords

Haihua An, Yiping Cao

Proceedings Volume 12478, Thirteenth International Conference on Information Optics and Photonics (CIOP 2022); 1247815 (2022) https://doi.org/10.1117/12.2652179
Event: Thirteenth International Conference on Information Optics and Photonics (CIOP 2022), 2022, Xi'an, China

Abstract

Minimizing the number of projecting patterns has been one of the most significant tasks in the field of phase-shifting profilometry. This paper proposes a projecting model of three phase-shifting patterns + one coded pattern to retrieve the absolute phase when measuring the object with isolated surfaces. Differing from the conventional stair-shaped codewords, the proposed sinusoidal codewords are extracted from phase-shifting patterns, and then successively encoded into different periods of one coded pattern. When decoding, four patterns provide one conventional wrapped phase with high precision and six coded phases to determine fringe order. After expanding fringe order, absolute phase can be calculated point-to-point. Experimental results demonstrate that the proposed approach can achieve a considerable measuring accuracy on the dynamic scene.

Citation Download Citation

Haihua An and Yiping Cao "Absolute phase retrieval based on the sinusoidal codewords", Proc. SPIE 12478, Thirteenth International Conference on Information Optics and Photonics (CIOP 2022), 1247815 (15 December 2022); https://doi.org/10.1117/12.2652179

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