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对东沙岛基于融合信息高分辨遥感影像分类研究 总被引：2，自引：0，他引：2
以SPOT510m多光谱高分辨率影像为数据基础,建立东沙岛地物信息提取的时空属性和地学规律等先验知识,在此基础上选取地物样本,并进行东沙岛地物光谱分析,从而进行东沙岛的融合信息分析,减少信息提取的误差,使解译的精度提高,结果表明,以先验知识为基础选取的样本光谱能够较好地反映地物光谱的信息含量;高分辨率影像能反映东沙岛的地物特征,并且在影像上能够反应东沙岛潟湖、口门等的发育状态,有效地揭示了地物的区分和地貌发育特征.以此进行的分类结果具有合理性;Kappa分析的分类精度达78.33%. 相似文献
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黄河三角洲湿地地物精确分类对湿地资源的保护、开发和利用具有重要意义。目前的湿地分类算法大多存在着全局信息利用不足,地物类型边界不易区分等问题,导致分类精度不高。针对此问题,本文提出了基于双路图卷积的黄河三角洲湿地地物分类算法,包括图结构数据构建模块、特征提取与融合模块两部分。图结构数据构建模块,设计欧式图表示光谱值之间的绝对差异,衡量不同地物类型,设计余弦图表达不同像素光谱波形之间的差异,用以区分不同的地物边界;特征提取与融合模块,利用图卷积聚合全局信息,对欧式图利用双层图卷积进行特征提取,对余弦图使用图U-Net网络进行特征提取,之后将两个特征融合,得到同时具有光谱值绝对差异和光谱波形差异的融合特征,最后进行分类。在CHRIS和GF5两个数据集的实验结果表明,本文所提算法在黄河三角洲湿地地物分类中取得了具有竞争力的分类结果。 相似文献
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联合光谱和纹理特征的滨海湿地高光谱深度学习分类—以黄河三角洲湿地为例 总被引：2，自引：0，他引：2
本文基于CHRIS高光谱遥感影像，发展了一种结合地物光谱特征和多纹理空间特征信息，采用双全链接的8层深度卷积神经网络分类算法对滨海湿地高光谱影像进行遥感地物分类，并在黄河口滨海湿地进行了应用。结果表明：1）基于测试样本数据，联合光谱特征和K-L变换的纹理特征信息，采用DCNN模型方法展现了高的分类精度，精度高达99%；2）利用光谱特征和全纹理特征的精度比仅使用光谱特征和光谱特征联合K-L变换后纹理特征的分类精度低。利用K-L变换后的光谱特征和纹理特征的DCNN分类精度达到99.38%，相比于使用全纹理特征信息的精度提高了4.15%；3）基于验证图像，发展的DCNN分类方法精度优于其他算法，DCNN方法总体分类精度为84.64%，Kappa系数为0.80；4）相比于浅层分类方法，本文发展的DCNN模型分类算法保证了所有地物类型的分类精度更加均衡，保持了主要地物类型的分类精度几乎不变，同时提高了滩涂和农田的精度。基于DCNN模型，潮滩和农田的分类精度分别达到79.26%和56.72%。比其它浅层分类方法提高了2.51%和10.6%。 相似文献
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Christopher G. Fox 《Marine Geophysical Researches》1996,18(6):707-728
An important application of detailed bathymetric mapping is the interpretation of geological processes based on the nature of the fine-scale morphology of the seafloor. This interpretation is usually accomplished through qualitative analysis of contour maps. In this paper, an objective classification technique, based on a two-dimensional spectral model of bathymetry developed by Fox and Hayes (1985) is applied to detailed Sea Beam data from the Juan de Fuca Ridge. Parameters of the model can be directly related to seafloor properties corresponding to 1) isotropic (non-directionally dependent) roughness; 2) anisotropic (directionally dependent) roughness; 3) orientation of the anisotropic component; and 4) spectral rool-off ( fractal dimension), by fitting the model surface to two-dimensional amplitude spectra of bathymetry determined on a regular grid over the study area. A test area was selected which encompasses the southern volcanic rift zone of Axial Volcano and the northern terminus of the Vance Segment. Parameters of the model clearly define the contrast between the constructional volcanic terrain (rough, isotropic, with high fractal dimension) and the tectonic extensional terrain (smoother, anisotropic, with low fractal dimension). An agglomerative, hierarchical cluster analysis is applied to the data, independent of spatial information, to delineate groups of spectra with similar characteristics. Distinct, mappable regions, corresponding to volcanic and tectonic provinces, are objectively determined. Also, coherent sub-regions of consistent spectral properties occur within the larger volcanic/tectonic divisions. The classification is extended to the Juan de Fuca Ridge system from 44°30 N to 47°20 N through combining these results with an a priori technique (K-means clustering). Broad-scale physiographic regions of the Juan de Fuca Ridge are delineated by the technique, which may aid geologists in the interpretation of crustal accretion processes at seafloor spreading centers.The U.S. Government right to retain a non-exclusive royaltyfree license in and to any copyright is acknowledged. 相似文献
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Recent habitat suitability models used to predict the occurrence of vulnerable marine species, particularly framework building cold-water corals, have identified terrain attributes such as slope and bathymetric position index as important predictive parameters. Due to their scale-dependent nature, a realistic representation of terrain attributes is crucial for the development of reliable habitat suitability models. In this paper, three known coral areas and a noncoral control area off the west coast of Ireland were chosen to assess quantitative and distributional differences between terrain attributes derived from bathymetry grids of varying resolution and information content. Correlation analysis identified consistent changes of terrain attributes as grain size was altered. Response characteristics and dimensions depended on terrain attribute types and the dominant morphological length-scales within the study areas. The subsequent effect on habitat suitability maps was demonstrated by preliminary models generated at different grain sizes. This study demonstrates that high resolution habitat suitability models based on terrain parameters derived from multibeam generated bathymetry are required to detect many of the topographical features found in Irish waters that are associated with coral. This has implications for marine spatial planning in the deep sea. Supplemental materials are available for this article. Go to the publisher's online edition of Marine Geodesy to view the free supplemental file. 相似文献
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信息技术的快速变革,有效驱动海洋信息化的发展与创新。实现海洋信息资源的高效存储和管理,需要对海洋数据管理体系进行统筹规划。文章根据海洋地质地球物理数据特点,进行了数据层次分类研究,分析了数据标准化过程,确立了基于文件和数据库的海洋地质地球物理数据存储策略,提出结构化事务型数据库、结构化分析型数据库(NewSQL)和非结构化计算型数据库(NoSQL)相结合的数据组织架构。该数据分类组织方案为实现海洋地质地球物理数据规范化管理、集约利用和共享服务奠定了良好基础,也为其他海洋数据分类与组织研究提供了参考。 相似文献
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In this paper, a new paradigm for "through-the-sensor" remote sensing of the seafloor is presented. The methodology has been tailored for use with the AN/SQS-53C sonar found on many U.S. Navy destroyers. Sonar beamformer outputs are processed, and a point georeferenced database of signal attributes is constructed. Corresponding sonar settings and ship navigation information are also included for each database point. Database entries are then fused with environmental characteristics, such as bathymetry and sound speed information. These data may be derived from historical databases, on-site measurements, or a combination of the two. The database is then completed by ambiguity resolution and matching of modeled eigenray paths with database entries in order to associate signal attributes with specific propagation paths. Model inputs are derived from a customized version of the Comprehensive Acoustic System Simulation/Gaussian Ray Bundle eigenray propagation model (CASS/GRAB), which performs propagation estimates over incremental range/depth steps. Illustrations of how the point database may be filtered/constrained, gridded, and displayed are presented. An example of how bottom scattering strength can be derived from the database is presented, followed by an example of a technique for monostatic bottom loss estimation. Results indicate that the approach presented in this paper represents a viable method for conducting "through-the-sensor" measurements of seafloor scattering properties. 相似文献
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现代测量种类繁多，各种数据缺乏统一管理，为此设计并创建测量信息管理系统（SIMS），在不同数据库簇分类的基础上，通过定义数据库模板来实现同一簇数据库文件的自动化创建，主程序可以方便地对相关测量数据库进行编辑、查询、统计与控制等管理操作；系统可对各种测量数据进行统一的数据库创建与管理，有助于不同测量数据存储与管理的标准化。 相似文献