【摘要】 根据不同海底地形特征,提出了基于多波束测量数据进行海底地形分割的"三态值模型"法,其步骤包括:将地形数据滤波和网格化;利用"3×3"差分算子计算各节点的梯度;利用最大梯度追踪算法检测正负地形与平缓地形的分界线;利用"三态值"算法识别正、负和平缓地形。应用该方法对胶州湾实验海区多波束实测数据处理结果表明,该方法切实可行,能够对数字海底地形准确地进行快速分割。更多还原

【Abstract】 According to the characteristics of different sea-floor terrains, a "three-state-value model" algorithm was developed to segment the digital sea-floor terrain surveyed by the multi-beam system, and the algorithmic steps include (1) filtering and gridding the sea-floor terrain data; (2) calculating the gradients at different grid nodes by using the "3×3" difference operator; (3) identifying the demarcation line between the positive or negative terrain and the gentle terrain by using the maximum gradient tracing operation; (4) identifying the positive, negative and gentle terrains by using the "three-state-value" algorithm. The algorithm was used to process the multi-beam survey data in the Jiaozhou Bay experimental area, and it is shown from the data processing results that the algorithm is practical and feasible and can be used to quickly segment the digital sea-floor terrain precisely.更多还原