共查询到20条相似文献，搜索用时 531 毫秒
1.
《地理信息系统科学与遥感》2013,50(3):321-337
The launch of the Very High Resolution (VHR) sensor satellites has paved the way for further exploitation of the capabilities of satellite stereo imaging for many applications. The objective of this paper is to evaluate the level of accuracy that can be achieved by using stereo satellite images for different applications involving significantly different types of terrain. Three mathematical models for satellite sensor modeling are used: Rational Function Model (RFM), 3D polynomial model, and 3D affine model. Three stereo pairs of image datasets are tested from different satellites for different areas: (a) Indian Remote Sensing (IRS)-1D stereo images for topographic mapping and digital terrain elevation modeling for an area in Egypt; (b) IKONOS stereo images for highway alignments extraction in Toronto, Canada; and (c) IKONOS stereo images for topographic mapping and geometric parameter extraction for highway alignments in Hong Kong, China. The accuracy was evaluated by comparing the results of the data extracted using stereo satellite images and those extracted from conventional techniques, including Global Positioning System, field measurements, and aerial photogrammetry. The accuracy of the extracted features was found to be within a pixel-level. The results of this paper should be of interest to professionals from different disciplines exploring the use and accuracy of satellite stereo images for topographic and transportation applications. 相似文献
2.
Bias-corrected rational polynomial coefficients for high accuracy geo-positioning of QuickBird stereo imagery 总被引：1，自引：0，他引：1
Xiaohua Tong Shijie Liu Qihao Weng 《ISPRS Journal of Photogrammetry and Remote Sensing》2010,65(2):218-226
The rational function model (RFM) is widely used as an alternative to physical sensor models for 3D ground point determination with high-resolution satellite imagery (HRSI). However, owing to the sensor orientation bias inherent in the vendor-provided rational polynomial coefficients (RPCs), the geo-positioning accuracy obtained from these RPCs is limited. In this paper, the performances of two schemes for orientation bias correction (i.e., RPCs modification and RPCs regeneration) is presented based on one separate-orbit QuickBird stereo image pair in Shanghai, and four cases for bias correction, including shift bias correction, shift and drift bias correction, affine model bias correction and second-order polynomial bias correction, are examined. A 2-step least squares adjustment method is adopted for correction parameter estimation with a comparison with the RPC bundle adjustment method. The experiment results demonstrate that in general the accuracy of the 2-step least squares adjustment method is almost identical to that of the RPC bundle adjustment method. With the shift bias correction method and minimal 1 ground control point (GCP), the modified RPCs improve the accuracy from the original 23 m to 3 m in planimetry and 17 m to 4 m in height. With the shift and drift bias correction method, the regenerated RPCs achieve a further improved positioning accuracy of 0.6 m in planimetry and 1 m in height with minimal 2 well-distributed GCPs. The affine model bias correction yields a geo-positioning accuracy of better than 0.5 m in planimetry and 1 m in height with 3 well-positioned GCPs. Further tests with the second-order polynomial bias correction model indicate the existence of potential high-order error signals in the vendor-provided RPCs, and on condition that an adequate redundancy in GCP number is available, an accuracy of 0.4 m in planimetry and 0.8 m in height is attainable. 相似文献
3.
GF-1卫星WFV影像几何定位稳定性研究 总被引：1，自引：1，他引：0
针对GF-1卫星WFV传感器高分辨率与大视场相结合的特点,本文将ZY-3卫星传感器校正产品作为参考,通过分析同名点对的地理信息,对北京地区WFV传感器4台相机影像相对几何定位精度进行长时间序列评价,分析其误差特征。试验结果表明,单景影像均出现了明显的系统几何定位误差,但是不同时相影像的几何定位误差方向并无明显规律。针对该现象本文基于相机成像原理,从理论上证明了仅利用某一时相影像的有理函数模型补偿参数是无法有效消除其他不同时相影像系统误差的。 相似文献
4.
GF-4卫星影像几何定位仿真分析 总被引：2，自引：2，他引：0
针对GF-4卫星静止轨道、高时间分辨率、面阵成像的特点,本文通过构建严格成像模型,实现了GF-4卫星影像几何定位仿真模拟。在对初始仿真定位结果进行分析后,建立了几何外检校模型,利用在轨真实成像影像和SRTM DEM对严格成像模型进行外检校处理,同时探讨了仿真控制点分布对相机姿态角常差检校的影响。试验结果表明,经过外检校处理后,构建的仿真模型能够有效模拟GF-4卫星在轨真实影像几何定位误差。 相似文献
5.
Zhonghua Hong Shengyuan Xu Yun Zhang Yanling Han Yongjiu Feng 《Journal of the Indian Society of Remote Sensing》2018,46(12):2081-2092
Ziyuan-3 (ZY-3) satellite is the first civilian stereo mapping satellite in China and was designed to achieve the 1: 50,000 scale mapping for land and ocean. Rigorous sensor model (RSM) is required to build the relationship between the three-dimensional (3D) object space and two-dimensional (2D) image space of ZY-3 satellite imagery. However, each satellite sensor has its own imaging system with different physical sensor models, which increase the difficulty of geometric integration of multi-source images with different sensor models. Therefore, it is critical to generate generic model, especially rational polynomial coefficients (RPCs) of optical imagery. Recently, relatively a few researches have been conducted on RPCs generation to ZY-3 satellite. This paper proposes an approach to evaluate the performance of RPCs generation from RSM of ZY-3 imagery. Three scenario experiments with different terrain features (such as ocean, hill, city and grassland) are designed and conducted to comprehensively evaluate the replacement accuracies of this approach and analyze the RPCs fitting error. All the experimental results demonstrate that the proposed method achieved the encouraging accuracy of better than 1.946E?04 pixel in both x-axis direction and y-axis direction, and it indicates that the RPCs are suitable for ZY-3 imagery and can be used as a replacement for the RSM of ZY-3 imagery. 相似文献
6.
As a model for sensor orientation and 3D geopositioning for high-resolution satellite imagery (HRSI), the affine transformation from object to image space has obvious advantages. Chief among these is that it is a straightforward linear model, comprising only eight parameters, which has been shown to yield sub-pixel geopositioning accuracy when applied to Ikonos stereo imagery. This paper aims to provide further insight into the affine model in order to understand why it performs as well as it does. Initially, the model is compared to counterpart, ‘rigorous’ affine transformation formulations which account for the conversion from a central perspective to affine image. Examination of these rigorous models sheds light on issues such as the effects of terrain and size of area, as well as upon the choice of reference coordinate system and the impact of the adopted scanning mode of the sensor. The results of application of the affine sensor orientation model to four multi-image Ikonos test field configurations are then presented. These illustrate the very high geopositioning accuracy attainable with the affine model, and illustrate that the model is not affected by size of area, but can be influenced to a modest extent by mountainous terrain, the mode of scanning and the choice of object space coordinate system. Above all, the affine model is shown to be both a robust and practical sensor orientation/triangulation model with high metric potential. 相似文献
7.
Three-Dimensional Geopositioning Accuracy of Ikonos Imagery 总被引：3，自引：0，他引：3
An investigation of the accuracy potential of Ikonos 1m satellite imagery is reported. Three sensor orientation/triangulation models are applied to stereo- and three-image configurations of "Geo" imagery with the aim of achieving 3D geopositioning to sub-metre accuracy. The models considered comprise rational functions with bias compensation, affine projection and the direct linear transformation. Test results from the Melbourne Ikonos Testfield are reported and these show that with modest provision of good quality ground control, Ikonos "Geo" imagery can yield 3D object-point determination to an accuracy of 0.5m in planimetry and 0.7m in height. The accuracy achieved is not only consistent with expectations for rigorous sensor orientation models, but is also readily attainable in practice with only a small number of ground control points being required 相似文献
8.
缺少控制点的卫星遥感对地目标定位 总被引：15，自引：2，他引：15
从单线阵推扫式传感器的成像机理出发，利用6个卫星轨道开普勒参数和3个传感器姿态角建立了推扫式卫星遥感影像坐标与其地面点在地心坐标系下的坐标关系式，即构像方程。按照所建立的构像方程，对某地区一景SPOT-5影像进行对地目标定位，获得了实地上83．392m的平面精度；利用单个地面控制点对卫星轨道开普勒参数和传感器姿态实施调整后，目标定位精度提高到14．217m。试验证实，所建立的构像方程是正确的,在卫星遥感对地目标定位中有较好的应用前景。 相似文献
9.
SHIWenzhong AhmedShaker 《地球空间信息科学学报》2004,7(1):24-30
The exploitation of different non-rigorous mathematical models as opposed to the satellite rigorous models is discussed for geometric corrections and topographic/thematic maps production of high-resolution satellite imagery (HRSI). Furthermore, this paper focuses on the effects of the number of GCPs and the terrain elevation difference within the area covered by the images on the obtained ground points accuracy. From the research, it is obviously found that non-rigorous orientation and triangulation models can be used successfully in most cases for 2D rectification and 3D ground points determination without a camera model or the satellite ephemeris data. In addition, the accuracy up to the sub-pixel level in plane and about one pixel in elevation can be achieved with a modest number of GCPs. 相似文献
10.
针对常用的几种钟差预报模型进行了研究,对其计算模型进行了详细的推导,并给出了模型参数的计算过程,以BLOCK IIR M卫星钟为例对几种钟差预报模型进行了比较分析,结果显示利用多项式模型、切比雪夫多项式模型进行预报时,随着采用的观测数据量的增大,无论短周期还是中、长周期预报,预报效果不一定会好,灰色系统模型只需要采用少量的观测数据来建模,减少了数据量,提高了建模速度,而且预报卫星钟差时精度有显著的提高,对于观测数据少,预报周期长的卫星具有明显优势。 相似文献
11.
Saeid Sadeghian Mohammad Javad Valadan Zoej Mahmoud Reza Delavar Ahmad Abootalebi 《International Journal of Applied Earth Observation and Geoinformation》2001,3(4):366
The huge capability of high resolution satellite imageries (HRSI), that includes spatial, spectral, temporal and radiometric resolutions as well as stereoscopic vision introduces them as a powerful new source for the Photogrammetry, Remote Sensing and GIS communities. High resolution data increases the need for higher accuracy of data modeling. The satellite orbit, position, attitude angles and interior orientation parameters have to be adjusted in the geometrical model to achieve optimal accuracy with the use of a minimum number of Ground Control Points (GCPs). But most high resolution satellite vendors do not intend to publish their sensor models and ephemeris data. There is consequently a need for a range of alternative, practical approaches for extracting accurate 2D and 3D terrain information from HRSI. The flexibility and good accuracy of the alternative models demonstrated with KFA-1000 and the well-known SPOT level 1A images. A block of eight KFA-1000 space photos in two strips with 60% longitudinal overlap and 15% lateral sidelap and SPOT image with rational function, DLT, 2D projective, polynomials, affine, conformal, multiquadric and finite element methods were used in the test. The test areas cover parts of South and West of Iran. Considering the quality of GCPs, the best result was found with the DLT method with a RMSE of 8.44 m for the KFA-1000 space photos. 相似文献
12.
GF-4卫星不同成像状态下影像定位误差特性分析 总被引：1，自引：0，他引：1
高分四号（GF-4）卫星作为我国高分对地观测系统中一颗高分辨率面阵成像的静止轨道卫星，其在不同成像状态下的影像几何定位精度一直是科研人员和应用部门所关注的。本文以谷歌地球数据为几何参考，通过对比GF-4卫星影像和谷歌地球影像上同名点位置信息，分析了GF-4卫星在凝视、俯仰、滚动成像状态下的影像定位特性。结果表明，单幅影像内部均出现了明显的系统误差，凝视成像过程中同一点位的影像定位误差波动较小，俯仰/滚动姿态影像定位误差与俯仰角/滚动角成正比关系。该结论可为地面数据处理部门和用户在数据校正和应用时提供参考。 相似文献
13.
三维计算机模拟模型是遥感辐射传输机理研究的重要内容,在复杂地表正向模拟和遥感反演中扮演着重要角色。经过最近20年的发展,三维计算机建模研究取得了显著进展,在地表辐射传输过程分析、模型和算法的验证及遥感反演等方面应用广泛。为了更加充分理解三维计算机模拟模型的发展和模型间的差异,及探讨如何将其更好的应用于生活、生产,本文对三维计算机模拟模型在光学遥感的研究进行了综述。本文从模型的原理、应用和发展趋势3个方面展开了论述。首先,简要介绍了光线追踪方法和辐射度方法的原理及现有的模型;然后,对三维计算机模拟模型在遥感的主要应用进行了总结;最后,对模型未来的发展趋势展开了讨论,从运行效率、模拟精度和功能集成等方面存在的问题和需求出发,分析了三维计算机模拟模型发展和遥感应用的趋势。随着复杂地表遥感建模研究的深入,计算机技术的发展和多源遥感数据特别是高时空分辨率数据的应用,三维计算机模拟模型将在遥感理论研究和应用发挥更加重要的作用。 相似文献
14.
《制图学和地理信息科学》2013,40(3):147-156
Pointable sensor systems onboard many earth resources satellites today, particularly the higher spatial resolution sensors, provide for a near infinite set of collection opportunities. Satellite orbits of these systems are not systematic repetitive tracks. Predicting future collection opportunities requires predicting where the satellite will be and then computing the potential swath coverage from a pointable sensor along these orbits. While each agency or company models its own satellite-sensor systems, few publicly available sources exist for mapping future satellite ground tracks. Evaluating collection opportunities from multiple satellite-sensor systems from different agencies/companies is problematic. The purpose of the research described in this article was to develop a generic approach for modeling future satellite-sensor collection opportunities. In this article, formulae are developed for computing the potential swath coverage, and an algorithm is designed for constructing the potential swath coverage area. The solution to the swath coverage problem is based on spherical trigonometry, a well known map projection (i.e., azimuthal equidistant map projection) used in an unconventional dynamic form, and a satellite orbital propagation model. We demonstrate how the computation of the swath coverage area can be accomplished using a temporal series of re-centered map projections. 相似文献
15.
针对国产卫星境外定位的实际需要,提出利用Google Earth数据量测控制点辅助高分辨率遥感影像区域网平差的方法。首先统一坐标系,将所量测的控制点高程坐标转换为大地高;然后将其视为精度较低的控制点参与平差。试验分为无地面控制点和布设稀少地面控制点两种情况,对于每种情况分别设计不同的试验方案分析Google Earth数据对于定位精度的影响。结果表明利用Google Earth数据辅助区域网平差可以明显提高定位精度,可为缺少地面控制点的境外地区的光学线阵遥感影像几何定位提供新的思路。 相似文献
16.
针对境外典型区域精细化三维建模数据获取与产品制作技术难点，本文设计归纳出一种高分辨率光学卫星影像精细化三维建模方法。选取迪拜市中心城区为试验区域，以WorldView-3、GeoEye-1等主流高分卫星影像为主要数据源，以互联网众源影像为辅助数据源，利用卫星影像精准定向精化的RPC参数及生成的精准几何信息（DSM/DOM），完成区域内主要建筑物的三维模型生产制作，并形成高分辨率卫星影像三维建模原型系统，满足全球地理信息资源建设与维护更新工程，快速制作符合精度和精细度要求的三维数字模型的需要。 相似文献
17.
利用GLAS激光测高数据评估DSM产品质量及精度优化 总被引：2，自引：0，他引：2
提出了一种利用卫星激光测高数据直接优化提升数字表面模型（DSM）产品精度的方法。选取境外中亚地区的资源三号DSM开展试验，通过采用多准则约束方法提取激光高程控制点，分别利用偏度、中值、线性、二次多项式等进行DSM误差修正，发现4种模型均能有效消除DSM系统误差，其中基于二次多项式的方法更适用于平地和丘陵地貌，线性模型更适用于高山地貌。试验验证了采用卫星激光测高数据优化境外DSM技术流程的可行性，最终可提高DSM的绝对高程精度。 相似文献
18.
Accuracy assessment of QuickBird stereo imagery 总被引：2，自引：0，他引：2
Mayumi Noguchi Clive S. Fraser Takayuki Nakamura Takahiro Shimono Shoichi Oki 《The Photogrammetric Record》2004,19(106):128-137
The Geographical Survey Institute of Japan has recently carried out an evaluation of the metric performance of QuickBird stereo satellite imagery. This paper describes the accuracy assessment of the sensor orientation and geopositioning phases of the study, the aim of which was twofold. First, it was desired to confirm the metric potential of QuickBird imagery for 1:25 000 scale topographic mapping. Second, a determination was to be made of the accuracy attainable from the Basic image product. The techniques of rational functions and affine bundle adjustment were employed, the former with bias compensation. The results obtained both reassert the high precision of the rational functions approach and cast doubt upon the applicability of the 3D affine model for accurate geopositioning from QuickBird imagery. 相似文献
19.
20.
《International Journal of Digital Earth》2013,6(11):897-915
Chromophoric dissolved organic matter (CDOM) strongly influences the water-leaving radiance from aquatic ecosystems. In most inland waters, the remote determination of CDOM absorption presents a central challenge due to their complex optical conditions. However, identifying the temporal and spatial variability of CDOM is fundamental to the understanding of aquatic biogeochemical dynamics. In the present study, semi-analytical and empirical modeling approaches were used to examine CDOM absorption in four, shallow, inland water bodies using the spectral bands and sensitivities of major satellite observational systems. Of the models examined, an empirical multiband model was found to provide the highest correlation with measured CDOM absorption. The spectral characteristics of the MERIS sensors yielded the best results with respect to the other available satellite sensors. High detrital load was observed to be a major impediment to estimating CDOM absorption, while lakes with elevated phytoplankton biomass did not present similar problems. 相似文献