A Laser Line Auto-Scanning System for Underwater 3D Reconstruction.

A Laser Line Auto-Scanning System for Underwater 3D Reconstruction.
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用于水下 3D 重建的激光线自动扫描系统

DOI:
10.3390/s16091534
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发表时间:
2016-09-20
期刊:
Sensors (Basel, Switzerland)
影响因子:
--
通讯作者:
Chen W
Chen W
中科院分区:
其他
文献类型:
--
作者:
Chi S;Xie Z;Chen W

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本文设计了一种激光线自动扫描系统,用于水下近距离三维重建,具有较高的精度和分辨率。该系统利用振镜改变激光平面方向进行自动扫描,获得连续的激光条纹,用于水下三维重建。利用目标平面和图像平面之间的单应性约束对系统参数进行了标定。定义了一个代价函数来优化振镜的转轴方程。对入射光和出射光在界面处的折射进行补偿。在实验室水下条件下,利用标准球对系统的精度和空间测量能力进行了测试和分析,并对某水下仪器密封盖进行了三维曲面重建,取得了满意的效果。
In this study, a laser line auto-scanning system was designed to perform underwater close-range 3D reconstructions with high accuracy and resolution. The system changes the laser plane direction with a galvanometer to perform automatic scanning and obtain continuous laser strips for underwater 3D reconstruction. The system parameters were calibrated with the homography constraints between the target plane and image plane. A cost function was defined to optimize the galvanometer’s rotating axis equation. Compensation was carried out for the refraction of the incident and emitted light at the interface. The accuracy and the spatial measurement capability of the system were tested and analyzed with standard balls under laboratory underwater conditions, and the 3D surface reconstruction for a sealing cover of an underwater instrument was proved to be satisfactory.
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