Intercalibration method for underwater three-dimensional mapping laser line scan systems
Intercalibration method for underwater three-dimensional mapping laser line scan systems
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DOI：
10.1364/ao.40.005991
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发表时间：
2001-11-20
期刊：
影响因子：
1.9
通讯作者：
Moore, KD
中科院分区：
文献类型：
--
作者：
Moore, KD
我提出了一种方法来校准一种全新的水下测深激光扫描系统，该系统使用单一目标距离。深度是通过在光源、接收器和高度准直的激光扫描穿过目标产生的单个光斑的瞬时位置之间进行三角测量来计算的。对于定标，使用海水的折射率来调制三角测量参数，而不是使用不同的目标距离来定标以进行扩展距离操作。利用独特的三角测量配置允许最初忽略接收器特性，从而可以确定扫描器参数。这允许激光光斑的精确定位，从而可以依次校准接收器。这种内部定标方法提供了源-接收器特性及其在系统内的几何布局的高分辨率参数，以便绝对水深测量。校准可以在现场实现。此外，为开发该方法而导出的理论模型可用于表征和优化未来的设计。(C)2001年美国光学学会。
I present a method to calibrate absolutely a new family of underwater bathymetric laser scanner systems that use a single target range. Depth is calculated by triangulation among the source, the receiver, and the instantaneous position of a single spot produced by a highly collimated laser beam scanned across the target. For calibration, the refractive index of seawater is used to modulate the triangulation parameters rather than use of different target ranges to calibrate for extended range operation. Exploitation of a unique triangulation configuration allows the receiver characteristics to be ignored initially so that the scanner parameters can be determined. This allows the accurate positioning of the laser spot so that the receiver, in turn, can be calibrated. This intercalibration method provides high-resolution parameterization of the source-receiver characteristics and their geometric layout within the system so that an absolute bathymetric. calibration can be realized in situ. In addition, a theoretical model derived to develop the methodology can be used to characterize and optimize future designs. (C) 2001 Optical Society of America.