1. College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou, Zhejiang 310018, China
2. College of Information Engineering, China Jiliang University, Hangzhou, Zhejiang 310018, China
Abstract：The digital reconstruction of ancient artifacts is an important analytical tool for archaeological excavations, but the structure of cultural relics with weak texture features is difficult to accurately register, resulting in significant 3D reconstruction errors. A three-dimensional reconstruction method based on complementary Gray code phase shift method is proposed to address this issue, and multi-angle point cloud registration is completed with the assistance of a turntable. Firstly, establish a binocular turntable pose transformation model and complete system calibration; Secondly, during the scanning process, the complementary Gray code phase shift method is used to obtain high-quality phase information, and single point cloud data is obtained through epipolar correction and stereo matching; Finally, the multi-angle stitching method of precision turntable is used to achieve the combination of point cloud images in various directions, and to construct a complete three-dimensional point cloud image of cultural relics. An experimental verification platform is built to verify the effectiveness of the method. The experimental results show that the error of the proposed algorithm is less than 0.11mm, and the error of the depth camera method is 6.96mm, which is 63.27 times larger than the error of the method proposed. It proves that the method proposed has advantages in building weak texture feature objects, and at the same time, the application of the turntable also achieved multi-angle 3D reconstruction of uniformly symmetric objects.
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2024, Vol. 45 
