Seafloor sediment classification based on multibeam sonar data   总被引：1，自引：1，他引：0  

ZHOUXinghua CHENYongqi 《地球空间信息科学学报》2004,7(4):290-296

The multibeam sonars can provide hydrographic quality depth data as well as hold the potential to provide calibrated measurements of the seafloor acoustic backscattering strength. There has been much interest in utilizing backscatters and images from multibeam sonar for seabed type identification and most results are obtained. This paper has presented a focused review of several main methods and recent developments of seafloor classification utilizing multibeam sonar data or/and images. These are including the power spectral analysis methods, the texture analysis, traditional Bayesian classification theory and the most active neural network approaches.  相似文献   

一种基于MATLAB的声呐条带图像自动拼接算法     

侯雪  周兴华  唐秋华  王朝阳 《海岸工程》2014,33(4):49-55

准确地实现侧扫声呐条带的拼接对于了解海底地形、提高对海床地物反映的准确度起着重要的作用,而相邻条带的配准是声呐条带拼接的重要前提.MATLAB以其强大的矩阵运算功能及具有丰富的图像处理函数等特点,在图像处理方面占据明显的优势.文中利用MATLAB的IPT工具箱实现了基于互信息方法的声呐条带图像的自动快速配准,通过实验验证了该配准方法的有效性.并用小波变换方法对配准好的条带图像进行融合,实现声呐条带图像的有效拼接和镶嵌.  相似文献   

基于回波时间的多波束测深与声纳数据匹配方法          下载免费PDF全文

朱小辰  刘雁春  夏伟  邹永刚 《海洋测绘》2010,30(1):25-28

以多波束精确的水深数据为参照源,采用原始回波时间对多波束测深数据与其同源声纳数据进行匹配,从而获得高精度和高分辨率的海底影像数据,并避免了传统声纳图像处理过程中斜距改正所带来的几何形变。匹配结果采用光照图输出,并与三维水深图、原始声纳图像和CARIS处理后的声纳图像进行比较分析。该方法有效地提高了多波束数据的利用率,增强了对海底地形的探测分辨率。  相似文献   

GPS无验潮多波束水下地形测量技术的分析与应用     

何广源  吴迪军  李剑坤 《地理空间信息》2013,11(2):155-156,159

介绍了GPS无验潮多波束水下地形测量的基本原理及方法要点。以琼州海峡跨海通道工程水下地形测量为例,对GPS潮位修正及多波束水深测量结果进行了分析。结果表明,综合运用GPS RTK和多波束测深技术进行宽水域水下地形测绘,可有效提高测量精度和工作效率。  相似文献   

Tasman Geosyncline greenstones and ophiolites   总被引：1，自引：1，他引：0  

K. A. W. Crook  E. Anne Felton 《Australian Journal of Earth Sciences》2013,60(1):117-131

Palaeozoic greenstones lying at the base of stratigraphic sequences or in fault blocks in the Tasman Geosyncline are compared with the Penrose Conference definnition of an ophiolite by using tabulated petrological, structural, and metallogenic data. Of 45 occurrences, only 9 are recognizably ophiolites: 4 are in rift zones adjoining Precambrian continental crust at the ends of the geosyncline; and away from the margins, in that part of the geosyncline most typically of West Pacific‐type, only 5 of the 33 greenstone occurrences are recognizably ophiolites. Ophiolites are rare in the Tasman Geosyncline, in contrast to several Atlantic‐type geosynclines. This may be a characteristic of West Pacific‐type geosynclines in general.

Alpine‐type serpentinites are rather common in the Tasman Geosyncline. The metallogeny of some shows affinities with ophiolites, suggesting a common origin as oceanic crust. Their relative abundance suggests that West Pacific‐type geosynclines, such as the Tasman Geosyncline, may have developed on oceanic crust of unusual composition. Alternatively, it may reflect differences of deformation style between Atlantic‐ and West Pacific‐type geosynclines.

The term ophiolite has been used uncritically in plate tectonic analyses of the Tasman Geosyncline, calling in question the objectivity of these analyses. If objectivity is to be maintained, some indication should be given of the quality of the data used in plate tectonic analyses.  相似文献   

障碍物探测方法探讨     

罗深荣  余海洪  张启国  巫贤虎 《海洋测绘》2013,33(1):38-42

介绍了侧扫声纳、多波束测深系统、磁力仪的工作原理,提出了障碍物探测的相关技术要求。实例分析了综合利用侧扫声纳、多波束进行沉船探测的方法,结合侧扫声图和多波束水深探明障碍物的精确位置,测得最浅点水深,全面获得障碍物信息,大大提高了探测质量。对铁磁性小目标探测能力进行评估,并用实例加以分析和佐证。  相似文献   

C3D及其与传统侧扫声纳的比较     

张济博  潘国富  苟诤慷  丁维凤  蒋维杰 《海洋测绘》2013,33(5):75-77

C3D是Benthos公司近年来推出的基于CAATI技术的一种新型测深侧扫声纳系统。从工作原理、技术参数、数据采集与后处理平台以及实测数据等方面将C3D和传统侧扫声纳进行了对比。对比表明两者的工作原理不同,C3D的采集数据密度更高,对采集和处理软件要求比传统声纳高,最后对两者采集的数据进行了分析。通过对比,为侧扫声纳系统的选用和引进提供了依据。  相似文献   

C3D测深侧扫声纳探测系统综述   总被引：2，自引：0，他引：2  

沈蔚  程国标  龚良平  李勇攀  韩军  章守宇  张进 《海洋测绘》2013,(4):79-82

对C3D测深侧扫声纳系统的构成、工作原理、性能、优点、应用等进行了介绍,对基于C3D构建水下探测系统和工程实践进行了研究,对C3D数据处理工具和方法进行了探讨,对C3D的优势、不足和应用前景进行了总结。实测表明,C3D是一款性能优越能够满足多种水下工程需要的声纳探测系统。  相似文献   

A generic swath‐mapping data format     

J. Scott Ferguson  Daniel A. Chayes 《Marine Geodesy》2013,36(2-3):129-140

There is a pressing need for standardization of data derived from bathy‐metric swath‐mapping systems. Currently several dozen multibeam and sidescan sonar data formats exist within the oceanographic community, and more can be expected as new systems are developed. Without some standardization of swath‐mapping data formats, the capability for use and integration of data from different systems will be severely compromised.

This paper presents a strategy for organizing swath bathymetry data in a logical modular fashion that will allow data from all current swath bathymetric sonar systems to be stored and accessed in a common fashion. We have chosen the approach of defining compact efficient modules for each logically independent portion of a data record and storing it in a manner that is portable between diverse computer architectures and operating systems. This approach is extensible to accommodate new types of data. Although specifically developed for swath bathymetry, this format is also capable of supporting digital sidescan data and other types of swath data.  相似文献   

Sidescan survey results from a multibeam sonar system—sea beam 2000     

Kushal Talukdar  William Capell  Christos Zabounidis 《Marine Geodesy》2013,36(2-3):63-79

  相似文献