| 走航测线数据跳点的剔除 |
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| 引用本文： | 吴学文,高金耀,包更生.走航测线数据跳点的剔除[J].海洋测绘,2007,27(4):44-46. |
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| 作者姓名： | 吴学文 高金耀 包更生 |
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| 作者单位： | 国家海洋局,第二海洋研究所,海底科学重点实验室,浙江,杭州,310012 |
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| 基金项目： | 国家近海海洋综合调查与评价专项(908-01-DW07/DW08) |
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| 摘 要： | 跳点普遍存在于重力、磁力、定位、水深等测线数据中。对跳点的处理分两个步骤:先利用改进的经典校验算法剔除大幅度的跳点,再利用信号处理的方法剔除小幅度的跳点。并在小幅度的跳点处理中提出先用小波收缩再用样条拟合的方法,较好地协调了相似性和光滑性,有效地逼近了真实值。
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| 关 键 词： | 跳点 稳健回归 小波收缩 样条拟合 |
| 文章编号： | 1671-3044（2007）04-0044-03 |
| 修稿时间： | 2006-09-012007-03-05 |
A New Thought of Disposing Abnormal Points of Surveying Line |
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| WU Xue-wen,GAO Jin-yao,BAO Geng-sheng.A New Thought of Disposing Abnormal Points of Surveying Line[J].Hydrographic Surveying and Charting,2007,27(4):44-46. |
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| Authors: | WU Xue-wen GAO Jin-yao BAO Geng-sheng |
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| Institution: | Key Lab of Submarine Geosciences, Second Institute of Oceanography, SOA, Hangzhou, Zhejiang, 310012 |
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| Abstract: | Abnormal points are common to see in surveying line such as gravity,magnetic force,GPS,depth and so on.In this paper,a new thought is put forward,which disposes abnormal points by two steps,firstly,eliminating the abnormal points in large scale by improved arithmetic;secondly,eliminating abnormal points in small scale by signal disposal method.Furthermore,the method of using wavelet transform and then spline fitting to approach the real value is given,which harmonizes the comparability and the smoothness,and enhances the elimination effects. |
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| Keywords: | abnormal point robust regression wavelet transform spline fitting |
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