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导航系统的民用化越来越广泛,将卫星遥感影像应用于车载导航、便携式导航等产品能够增强其视觉效果和直观性,因此快速制作海量遥感影像就成为一个新的要求。本文将分别阐述卫星遥感影像种类、处理软件种类以及资源三号影像应用于导航系统的优势,并且简要介绍海量遥感影像的处理流程。 相似文献
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通过合理地组织与存储数据,在嵌入式硬件环境下,融合嵌入式系统、GPS、GIS与摄影测量技术等多种技术,将移动计算技术和影像服务应用到传统的地理信息服务中,以实现移动目标的定位和导航等功能,并构建嵌入式街景导航系统。 相似文献
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近年来,遥感影像获取技术的不断革新,影像分辨率不断提高,其数据量呈现几何级数增长。面对海量的遥感影像数据,如何将其加以有效的管理分发,成为实际应用中迫切需要解决的问题。本文介绍了目前国内外遥感影像管理系统的研究现状,整理分析了各种研究成果,最后文章给出了作者自己的见解。 相似文献
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随着遥感影像数据获取技术的进步以及数据的快速积累,如何高效地管理各种海量的影像数据成为制约影像数据应用的瓶颈。探讨了ArcSDE结合Oracle的遥感卫星影像、传统航摄影像、无人机航摄影像、DOM成果影像等影像数据的存储与管理,以及基于ArcGIS Engine的综合影像数据库系统的实现及其功能与业务应用。阐述了系统的技术路线以及业务流程,通过成功的案例,为影像数据的管理与应用提供理论和技术支撑。 相似文献
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周翔 《测绘与空间地理信息》2017,40(7)
从业务现状和功能需求着手,对多源遥感影像管理与分发服务系统的设计进行分析,着重探讨了基于插件式框架的遥感影像信息采集技术、基于建模技术的多源遥感影像管理方法、基于多线程技术的海量影像快速查询方法以及基于订单的内外网一体化数据分发模式。并依托系统建设案例,实现对多源遥感影像的科学管理和高效分发的集成,验证了研究成果的可靠性和实用性。 相似文献
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本文论述了遥感技术在地质工作中应用的8个方面问题,即遥感技术在地质工作中的作用的认识问题、遥感解译和信息提取问题、环形构造问题、影像变异问题、地质体可解译程度问题、影像异常问题、透视信息问题以及遥感地质影像模型问题。文中对上述问题的目前研究现状及今后研究方向进行了初步分析,并提出了个人的初步见解。 相似文献
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Image compositing is a multi-objective optimization process. Its goal is to produce a seamless cloud and artefact-free artificial image. This is achieved by aggregating image observations and by replacing poor and cloudy data with good observations from imagery acquired within the timeframe of interest. This compositing process aims to minimise the visual artefacts which could result from different radiometric properties, caused by atmospheric conditions, phenologic patterns and land cover changes. It has the following requirements: (1) image compositing must be cloud free, which requires the detection of clouds and shadows, and (2) the image composite must be seamless, minimizing artefacts and visible across inter image seams. This study proposes a new rule-based compositing technique (RBC) that combines the strengths of several existing methods. A quantitative and qualitative evaluation is made of the RBC technique by comparing it to the maximum NDVI (MaxNDVI), minimum red (MinRed) and maximum ratio (MaxRatio) compositing techniques. A total of 174 Landsat TM and ETM+ images, covering three study sites and three different timeframes for each site, are used in the evaluation. A new set of quantitative/qualitative evaluation techniques for compositing quality measurement was developed and showed that the RBC technique outperformed all other techniques, with MaxRatio, MaxNDVI, and MinRed techniques in order of performance from best to worst. 相似文献
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This paper is an exploratory study, which aimed to discover the synergies of data fusion and image segmentation in the context of EO-based rapid mapping workflows. Our approach pillared on the geographic object-based image analysis (GEOBIA) focusing on multiscale, internally-displaced persons’ (IDP) camp information extraction from very high spatial resolution (VHSR) images. We applied twelve pansharpening algorithms to two subsets of a GeoEye-1 image scene that was taken over a former war-induced ephemeral settlement in Sri Lanka. A multidimensional assessment was employed to benchmark pansharpening algorithms with respect to their spectral and spatial fidelity. The multiresolution segmentation (MRS) algorithm of the eCognition Developer software served as the key algorithm in the segmentation process. The first study site was used for comparing segmentation results produced from the twelve fused products at a series of scale, shape, and compactness settings of the MRS algorithm. The segmentation quality and optimum parameter settings of the MRS algorithm were estimated by using empirical discrepancy measures. Non-parametric statistical tests were used to compare the quality of image object candidates, which were derived from the twelve pansharpened products. A wall-to-wall classification was performed based on a support vector machine (SVM) classifier to classify image objects candidates of the fused images. The second site simulated a more realistic crisis information extraction scenario where the domain expertise is crucial in segmentation and classification. We compared segmentation and classification results of the original images (non-fused) and twelve fused images to understand the efficacy of data fusion. We have shown that the GEOBIA has the ability to create meaningful image objects during the segmentation process by compensating the fused image’s spectral distortions with the high-frequency information content that has been injected during fusion. Our findings further questioned the necessity of the data fusion step in rapid mapping context. Bypassing time-intensive data fusion helps to actuate EO-based rapid mapping workflows. We, however, emphasize the fact that data fusion is not limited to VHSR image data but expands over many different combinations of multi-date, multi-sensor EO-data. Thus, further research is needed to understand the synergies of data fusion and image segmentation with respect to multi-date, multi-sensor fusion scenarios and extrapolate our findings to other remote sensing application domains beyond EO-based crisis information retrieval. 相似文献
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The technique of image matching is the basis of image fusion,image mosaic and scene 3D reconstruction.In the paper a novel image registration method based on SUSAN operator is proposed.Firstly,Corner points are extracted by using SUSAN(Smallest Univalue Segment Assimilating Nucleus) operator.Then matched corner points are selected through coarse matching and fine matching.Based on such corner pairs,aerophotos are registered automatically. 相似文献
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基于小波变换的图像变焦技术 总被引:2,自引:0,他引:2
图像变焦是图像信息系统中的一项基本功能,本文采用小波分析的理论来完成图像的缩小和放大任务,使得图像在缩小过程中保留较大的结构特征,而在图像放大过程中增强边缘信息,有效地克服在重采样和内播技术完成变焦时所产生的缺陷。 相似文献
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立体影像匹配是自动提取SPOT影像高程信息的关键技术。本文根据SPOT影像在几何构像关系和影像质量上的特点,提出了多级匹配的结构策略。实际像对匹配实验表明,多级匹配法具有较好的可靠性和精度水平,而且运算速度快,在快速生成DEM数据辅助遥感信息分析方面,有重要的应用价值。 相似文献
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