基于双目立体视觉的电解阴极铜板三维重建研究

Research on 3D Reconstruction of Electrolytic Cathode Copper Plate Based on Binocular Stereo Vision

摘要: 针对电解生产阴极铜过程中对其表面质量监测的需求，提出基于双目立体视觉技术进行阴极铜表面具有深度信息瑕疵三维重建方法。首先通过分析大视场下平行双目检测精度模型，建立具有宽基线的双目立体结构，保证定位理论精度。然后为了进行基于SGBM的三维重建，利用稀疏特征点匹配缩小视差搜索范围，提升宽基线稠密立体匹配的效率及精度。使用设计系统进行测量实验，结果表明：该方法实现了对具有瑕疵的电解阴极铜板误差1 mm内的三维重建。这对于电解生产过程中的质量监测具有重要意义，可以帮助及时发现和定位表面瑕疵，从而提高产品质量并减少生产成本。

Abstract: Aiming at the requirement of monitoring the surface quality of cathode copper in the process of electrolytic production, a three-dimensional reconstruction method based on binocular stereo vi-sion technology for defects with depth information on the surface of cathode copper is proposed. First, by analyzing the parallel binocular detection accuracy model under a large field of view, a binocular stereo structure with a wide baseline is established to ensure the theoretical accuracy of positioning. Then, in order to perform 3D reconstruction based on SGBM, sparse feature point matching is used to narrow the disparity search range and improve the efficiency and accuracy of wide baseline dense stereo matching. Using the design system to carry out measurement experi-ments, the results show that: the method realizes the three-dimensional reconstruction of the elec-trolytic cathode copper plate with defects within 1 mm error. This is of great significance for quality monitoring in the electrolytic production process, and can help to detect and locate surface defects in time, thereby improving product quality and reducing production costs.