基于三次样条曲面的多波束测深信息处理

A Data Processing Method Based on Cubic Spline Surface in Multibeam Systems

在多波束测量过程中,由于人为或自然的原因,所测数据不可避免存在干扰。这些干扰影响海底地形图的精度,必须加以修正。文中提出了一种修正模型——三次样条插值法。先应用三次样条曲线和牛顿迭代理论,对多波束测量数据中未测出点的坐标进行恢复,再以三次样条曲面内插来修正多波束测量数据中存在的深度野值,并取得了较好的效果。对实际多波束测量数据进行分析处理结果表明,用三次样条内插算法修正多波束测量数据是一种有效的方法,拓宽了野值处理方面的思路。

There are all sorts of interference, for the reasons of both human and nature, in the measurement of multibeam data inevitably. The depth of these disturbances will bring the quality of submarine topography, must be removed. This paper presents a modified model - cubic spline interpolation. The coordinates not detected could be recovered by cubic spline curve and Newton iteration firstly. Outliers of depth could be modified by cubic spline interpolation in the measurement of multibeam, and got a good result. The following simulations and analysis of this method proved that it was an effective method to modify the measurement of multibeam data, and widened the thoughts about outliers processing.