共查询到20条相似文献，搜索用时 93 毫秒
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为了实现NOAA卫星遥感影像在提供丰富的宏观信息的同时 ,能够具有较高的面积估计精度这一目标 ,以吉林省为例 ,根据 1998年的NOAA卫星遥感影像数据以及最新的TM卫星遥感影像数据 ,构建了高分辨率卫星影像数据对低分辨率卫星影像数据的面积精度校正模型 ,并引入分形理论对影像空间结构特征进行深入研究 相似文献
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在山西省地理国情普查实验区朔州市资源3号卫星遥感影像数据的处理中,需要使用多种软件处理遥感影像数据。本研究结合多种处理流程和技术方法,通过对处理后的影像数据分析比较,找到了卫星遥感影像数据处理的最佳途径,重点分析了卫星遥感影像的纠正方法,为在地理国情普查工作中提高多源卫星遥感影像数据处理效率和质量进行了有益探索。 相似文献
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本文主要探讨了SPOT5卫星遥感影像在1：1万基础测绘中的应用。本文围绕实际生产,重点阐述了卫星遥感影像高精度正射纠正技术、真彩色影像融合处理技术以及大范围影像批量分幅方法,并对不同控制点布设方案制作的卫星遥感正射影像图进行了精度分析。 相似文献
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简述高分辨率遥感卫星影像的几何定位处理过程,分析了区域网平差的必要性。结合线阵传感器的成像特点,对传感器严格几何模型、卫星轨道模型、传感器内方位误差模型进行研究,初步建立了高分辨率遥感卫星的平差数学模型。采用区域网平差方法对内方位元素和外方位元素进行解算,并利用资源三号卫星线阵影像和ALOS PRISM线阵影像进行试验。试验结果表明,对高分辨率遥感卫星线阵传感器进行区域网平差可以有效提高卫星影像的几何定位精度。 相似文献
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随着国产遥感卫星影像资源的日益丰富,基于国产遥感卫星影像的应用与研究也逐渐成为焦点。目前,充分利用国产卫星影像,逐步减少使用国外遥感影像,是我国现代测绘产业发展的大趋势。论文基于资源三号国产卫星影像,分别在稀少控制点、足够多控制点的条件下,研究快速生产DSM的技术流程,并对其精度进行对比分析,对基于国产高分辨率遥感卫星影像的现代测绘产品快速生产具有重要的理论意义和实践意义。 相似文献
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周万里 《测绘与空间地理信息》2021,44(9):112-116
随着地理信息服务对数据更新要求越来越高,处理卫星遥感影像速度也要求越来越快.RPC无像控点校正遥感影像是目前较流行的快速遥感影像处理方式.资源三号遥感卫星是我国第一颗民用高分辨率测绘卫星,其轨道定位和相机参数精度高,可以实现较高精度的RPC影像校正.本研究通过广西多个不同地形地貌地区的资源三号卫星遥感影像的RPC校正,分析其影像绝对定位精度以及多光谱影像与全色光谱影像的相对定位精度,评估进行快速无像控点影像校正的可行性. 相似文献
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不同DEM数据对卫星遥感影像纠正精度的影响 总被引：6，自引：0，他引：6
从生产的实际工作出发，利用SPOT卫星影像为影像资料源，对卫星遥感影像的纠正方法进行对比试验，研究不同DEM数据对卫星遥感影像纠正精度的影响并对实际工作提供建议。 相似文献
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变化检测技术及其在高分辨率卫星遥感影像中的应用 总被引：1，自引：0，他引：1
对高分辨率遥感卫星影像利用变化检测技术更新现有的影像数据库或地图数据库是一项对测绘具有重要意义的工作.对现有的变化检测技术进行了分类总结,然后提出了对高分辨率遥感卫星影像进行变化检测的实施流程,最后结合数学形态学算法对SPOT5影像(2.5 m分辨率)进行了相关实验. 相似文献
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This paper discusses the development and implementation of a method that can be used with multi-decadal Landsat data for computing general coastal US land use and land cover (LULC) maps consisting of seven classes. With Mobile Bay, Alabama as the study region, the method that was applied to derive LULC products for nine dates across a 34-year time span. Classifications were computed and refined using decision rules in conjunction with unsupervised classification of Landsat data and Coastal Change and Analysis Program value-added products. Each classification’s overall accuracy was assessed by comparing stratified random locations to available high spatial resolution satellite and aerial imagery, field survey data and raw Landsat RGBs. Overall classification accuracies ranged from 83 to 91% with overall κ statistics ranging from 0.78 to 0.89. Accurate classifications were computed for all nine dates, yielding effective results regardless of season and Landsat sensor. This classification method provided useful map inputs for computing LULC change products. 相似文献
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Land cover classification using Landsat 8 Operational Land Imager data in Beijing,China 总被引：1，自引：0，他引：1
The successful launch of Landsat 8 provides a new data source for monitoring land cover, which has the potential to significantly improve the characterization of the earth’s surface. To assess data performance, Landsat 8 Operational Land Imager (OLI) data were first compared with Landsat 7 ETM + data using texture features as the indicators. Furthermore, the OLI data were investigated for land cover classification using the maximum likelihood and support vector machine classifiers in Beijing. The results indicated that (1) the OLI data quality was slightly better than the ETM + data quality in the visible bands, especially the near-infrared band of OLI the data, which had a clear improvement; clear improvement was not founded in the shortwave-infrared bands. Moreover, (2) OLI data had a satisfactory performance in terms of land cover classification. In summary, OLI data were a reliable data source for monitoring land cover and provided the continuity in the Landsat earth observation. 相似文献
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Acquisition probability differences in cloud coverage of the available Landsat observations over mainland Southeast Asia from 1986 to 2015 总被引：1，自引：0，他引：1
Landsat data are the longest available records that consistently document global change. However, the extent and degree of cloud coverage typically determine its usability, especially in the tropics. In this study, scene-based metadata from the U.S. Geological Survey Landsat inventories, ten-day, monthly, seasonal, and annual acquisition probabilities (AP) of targeted images at various cloud coverage thresholds (10% to 100%) were statistically analyzed using available Landsat TM, ETM+, and OLI observations over mainland Southeast Asia (MSEA) from 1986 to 2015. Four significant results were found. First, the cumulative average acquisition probability of available Landsat observations over MSEA at the 30% cloud cover (CC) threshold was approximately 41.05%. Second, monthly and ten-day level probability statistics for the 30% CC threshold coincide with the temporal distribution of the dry and rainy seasons. This demonstrates that Landsat images acquired during the dry season satisfy the requirements needed for land cover monitoring. Third, differences in acquisition probabilities at the 30% CC threshold are different between the western and eastern regions of MSEA. Finally, the ability of TM, ETM+, and OLI to acquire high-quality imagery has gradually enhanced over time, especially during the dry season, along with consequently larger probabilities at lower CC thresholds. 相似文献
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基于影像的Landsat TM/ETM+数据正规化技术 总被引：7，自引：0，他引：7
徐涵秋 《武汉大学学报(信息科学版)》2007,32(1):62-66
阐述了基于影像的LandsatTM／ETM^＋的数据正规化技术及其发展。该技术通过将Landsat影像的亮度值转换成传感器处的辐射值和反射率采对影像进行辐射校正。实例表明，使用正规化技术处理后的影像可以明显削弱日照和大气的影响，去除它们产生的噪声；其所书的传感器处的反射率与地面实测反射率的RMS值非常小。 相似文献
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从Landsat8影像反演地表温度的劈窗算法研究 总被引：1，自引：0，他引：1
以厦门市为研究区域,以2013年的Landsat8为研究数据,研究亮度温度反演以及地表温度反演的劈窗算法,推导出该算法的演算过程,根据Landsat8的特性,确定该算法的参数取值。通过ENVI/IDL软件编程实现该算法,采用厦门市遥感数据反演地表温度,并且利用厦门市气象局实测温度验证地表温度反演结果的有效性。 相似文献
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K. R. Rao A. D. Kulkarni G. C. Chennaiah 《Journal of the Indian Society of Remote Sensing》1981,9(1):45-48
In interpretation of Landsat imagery that are obtained in different spectral bands, it is often desirable to superimpose some sort of ‘z’ information like terrain height, gravity or magnetic field of the Earth over these imagery. This can be achieved by decomposition of Landsat imagery into synthetic stereo pair by using known ‘z’ information. This enhances interpretation capabilities and such stareo decomposition is quite useful in many practical applications. Here, a method of stereo decomposition of Landsat image when ‘z’ information is available has been developed and implemented. As an illustrative example, a method has been applied for a Landsat scene and the results of the same are shown in the plates. 相似文献
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Anssi Pekkarinen Lucia Reithmaier Peter Strobl 《ISPRS Journal of Photogrammetry and Remote Sensing》2009,64(2):171-183
This paper describes a simple and adaptive methodology for large area forest/non-forest mapping using Landsat ETM+ imagery and CORINE Land Cover 2000. The methodology is based on scene-by-scene analysis and supervised classification. The fully automated processing chain consists of several phases, including image segmentation, clustering, adaptive spectral representativity analysis, training data extraction and nearest-neighbour classification. This method was used to produce a European forest/non-forest map through the processing of 415 Landsat ETM+ scenes. The resulting forest/non-forest map was validated with three independent data sets. The results show that the map’s overall point-level agreement with our validation data generally exceeds 80%, and approaches 90% in central European conditions. Comparison with country-level forest area statistics shows that in most cases the difference between the forest proportion of the derived map and that computed from the published forest area statistics is below 5%. 相似文献
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本文利用2013年4月18日获取的天宫一号高光谱成像仪数据和1985年5月1日获取的Landsat TM数据,对黄河入海口地区湿地的土地利用状况进行了监测研究.通过对比分类结果发现,该地区近30年来人类活动对湿地的影响强烈,滩涂开垦、水产养殖业占用自然水面现象严重.同时由于天宫一号高光谱成像仪数据具有更高的光谱和空间分辨率,其分类精度优于Landsat TM,更适合于湿地的监测. 相似文献