基于反格雷码辅助相移法的高鲁棒三维测量

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doi：10.37188/OPE.20253301.0001 CSTR：32169.14.OPE.20253301.0001

Anti-Gray code aided phase-shift method for high-robust 3D measurements

FENG Yun 1，2 ，LIPeiwu²，WU Wenlei²，LYV Jianyu 2 ， LIU Xiaojun ，CHEN Liangzhou1 （1. School of Mechanical Science & Engineering， Huazhong University of Science and Technology， Wuhan 430000， China; 2. Guilin Measuring & Cutting Tool Co.，Ltd，Guilin 54lOOO，China） *Correspondingauthor，E-mail：chenlz@hust.edu.cn

Abstract： To address the challenges of low robustness and accuracy in structured light 3D measurement systems caused by environmental interference and the geometric characteristics of measured objects，this study focuses on improving the system's projection encoding method，projection efficiency，and related algorithms.First，to enhance system robustness，a novel approach combining complementary Gray code and phase-shifting is proposed. Second，to reduce the extended projection time resulting from multiple patterns，a synthetic pattern paralel loading method is introduced， significantly accelerating projection speed. Third，to mitigate issues such as light occlusion and shadows caused by object geometry，a dual-projector single-camera system is designed，expanding the measurement field of view and effctively eliminating shadows. Finally，a comprehensive performance comparison with existing methods，，including complementary Gray code with phase-shiftingandlthe multi-frequency heterodyne method，is conducted to validate the proposed approach. Experimental results demonstrate that the proposed method substantially improves system robustness and overall performance.Specifically，the synthetic pattern parallel loading method enhances projection efficiency by 55.51% compared to the baseline approach，achieving a measurement standard deviation of 0.014mm . The proposed method significantly enhances system robustness and accuracy， surpassing traditional encoding techniques.

Key words： three-dimensional measurement; anti-Gray code； phase shifting； projection acceleration； du-al-projector single-camera

1引言

光学三维测量方法具有非接触、速度快、无损伤等优点，目前已广泛应用于高端装备制造检测、医疗和科研等领域。（剩余11719字）