3D Reconstruction of Reflective Objects Based on Local Grating Completion

A reconstruction technique using local grating complement is suggested in order to address the issues of phase error and decreased reconstruction accuracy brought on by grating deformation brought on by strong reflection on the surface of the object during three-dimensional reconstruction of structured light. First, it is investigated how the measured object's material characteristics and reflection parameters like the specular reflection angle contribute to the missing phenomenon in the 3D reconstructed point cloud model. Second, a local grating completion approach is added before phase unwrapping to finish the missing portion of the grating in the reflective area in order to increase the phase unwrapping accuracy. This method is based on the phase shift method and complementary Gray code reconstruction method. The reflective rectangular aluminum alloy plate was constructed with a monocular structured light 3D reconstruction technique that had a flatness inaccuracy of less than 0.5 millimeters. After testing, it has been found that the improved method described in this paper can effectively compensate for the reconstruction loss brought on by the object surface's reflection. In addition, the phase decoding information is more complete, the reconstruction rate is 25% higher than with the traditional method, and the flatness error rate is reduced by 28.2%.