单波束水深约束的侧扫声呐图像三维微地形反演

发布时间：2018-01-17 03:00

  本文关键词：单波束水深约束的侧扫声呐图像三维微地形反演　出处：《哈尔滨工程大学学报》2017年05期 　论文类型：期刊论文

  更多相关文章： 侧扫声呐图像 微地形反演 明暗形状恢复 约束方法 地形频谱分析

【摘要】：高分辨率海底微地形可呈现更丰富的海床细节特征,对水下目标正确判读具有重要意义。除去底质因素影响,侧扫声呐图像明暗变化与海底地形起伏变化有关,挖掘侧扫声呐图像中的微地形信息,可以弥补现有测深手段分辨率上的不足。针对SFS方法从侧扫声呐图像反演出的相对地形缺少起伏尺度约束和起算基准等问题,本文通过小波分析方法从单波束数据中分别提取与侧扫声呐图像反演地形相关的高频地形及表征地形趋势变化的低频地形,以此构建侧扫声呐反演地形的尺度约束及基准改正模型。试验获得的反演地形从整体趋势到细节特征均与真实地形具有较好的一致性,统计结果表明,反演地形内、外符合均方根误差均小于15 cm,反演地形整体精度与单波束地形相当。
[Abstract]:The high-resolution seabed microtopography can present more detailed features of seabed, which is of great significance for the correct interpretation of underwater targets. Except for the influence of bottom material, the variation of light and dark of side-scan sonar image is related to the fluctuation of submarine topography. The micro-terrain information in the side-scan sonar image is excavated. It can make up for the deficiency in the resolution of the existing sounding methods. Aiming at the problem that the relative terrain of the inverse performance of the SFS method from the side-scan sonar image lacks the undulating scale constraints and the starting datum and so on. In this paper, the high frequency terrain associated with side scan sonar image inversion and the low frequency terrain which represent the change of terrain trend are extracted from single beam data by wavelet analysis method. The scale constraints and datum correction model of side-scan sonar inversion terrain are constructed. The obtained inversion terrain features from the overall trend to the details are in good agreement with the real terrain, the statistical results show. In the inversion terrain, the root mean square error of the outer coincidence is less than 15 cm, and the whole precision of the inversion terrain is equivalent to that of the single beam terrain.
【作者单位】： 武汉大学测绘学院;东华理工大学江西省数字国土重点实验室;武汉大学动机学院;
【基金】：国家自然科学基金项目(41376109,41576107,41606114) 江西数字国土重点实验室开放基金项目(DLLJ201502) 精密工程与工业测量国家测绘局重点实验室开放基金项目(PF2015-7)
【分类号】：P229.1
【正文快照】： 网络出版地址:http://www.cnki.net/kcms/detail/23.1390.u.20170426.1031.010.html随着我国海洋开发向远海深海推进,各种海洋活动对海床地形的质量和分辨率也提出了更高的要求[1-2]。精细的海床地形可表征海床表面“麻坑”或“丘顶”等微观特征[3-4],对发现天然气水合物疑似，

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