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1.
《The Photogrammetric Record》1985,11(66):666-666
The Photogrammetric Society and the Remote Sensing Society held a joint symposium at Burlington House, London on 13th March, 1985. A number of papers were presented which related early experience gained with the use of Metric Camera photography taken from Spacelab in December 1983. Their authors described the Metric Camera experiment, the quality of satellite photography and presented and considered results from a number of applications in topographic and hydrographic mapping and land classification. It had been intended to include reports on the use of Large Format Camera photography taken in October 1984 but delays in release of this photography meant that insufficient time had elapsed,for the accomplishment of useful investigations. 相似文献
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随着卫星遥感影像处理技术的不断提高,卫星遥感影像的广泛应用已成为讨论热点。本文探讨和研究基于SPOT5卫星遥感影像制作用于1:5万地形图的生产模式、工艺流程和相应的技术指标。 相似文献
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Application of a New Symmetry-Based Cluster Validity Index for Satellite Image Segmentation 总被引：2，自引：0，他引：2
An important approach for image segmentation is clustering pixels based on their spectral properties. In particular, satellite images contain land cover types, some of which cover significantly large areas, while some (e.g., bridges and roads) occupy relatively much smaller regions. Automatically detecting regions or clusters of such widely varying sizes presents a challenging task. In this letter, a symmetry-based cluster validity index, named Sym-index (Symmetry distance-based index), is proposed. It is able to correctly indicate the presence of clusters of different sizes as long as they are internally symmetrical. A genetic-algorithm-based clustering technique that optimizes the Sym-index is used for image segmentation where the number of clusters is determined automatically. The superiority of the proposed index, as compared to other indices, is established for automatically segmenting the land cover types from SPOT and Indian Remote Sensing satellite images of two different cities in India. 相似文献
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一种提高CCD成像卫星空间分辨率的方法研究 总被引：10，自引：0，他引：10
从卫星硬件设计与地面软件处理相结合的角度出发，建立了一套提高卫星图像空间分辨率的方法。对模拟靶标图像、一航景物图像、遥感图像分别进行了不同分辨率成像效果的计算机模拟。结果表明，所建立的卫星图像空间分辨率提高理论是正确的，使卫星图像空间分辨率提高2倍甚至更多在理论上是可行的。这一研究成果的实际应用，将会提高卫星的空间分辨率，也可以在保持卫星分辨率的条件下，缩小光学仪器的焦距，使卫星相机小型化，减小其体积和重量。 相似文献
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遥感技术在土地更新调查中的应用 总被引：1，自引：1，他引：0
对使用遥感影像辅助土地利用更新的可行性进行了分析,并以SPOT-5为例,探讨了遥感技术在土地更新调查中的应用。研究发现,经过几何纠正和数据融合处理的SOPT-5遥感正射影像图数据对线状地物和图斑的判别清晰,从而大大提高工作效率。 相似文献
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A. P. Subudhi K. V. S. Badrinath S. K. Govil 《Journal of the Indian Society of Remote Sensing》1989,17(3):35-42
Satellite Remote Sensing data has been found useful for various applications in natural resources survey because of its synoptic and repetitive coverage. It is further recognised that it has wide application in urban and regional studies. Till now much of the earlier work has been concentrated on visual interpretation of satellite data. It is felt that digital image processing of satellite data could be useful for urban studies. For this purpose the digital image processing of Delhi area has been considered to demonstrate its potentiality in urban applications. IRS LISS II data of Delhi area has been used on a low cost image processing system. The results of application of various image processing algorithms have been discussed to show the suitability for urban area studies. 相似文献
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The relative abundance and distribution of trees in savannas has important implications for ecosystem function. High spatial resolution satellite sensors, including QuickBird and IKONOS, have been successfully used to map tree cover patterns in savannas. SPOT 5, with a 2.5 m panchromatic band and 10 m multispectral bands, represents a relatively coarse resolution sensor within this context, but has the advantage of being relatively inexpensive and more widely available. This study evaluates the performance of NDVI threshold and object based image analysis techniques for mapping tree canopies from QuickBird and SPOT 5 imagery in two savanna systems in southern Africa. High thematic mapping accuracies were obtained with the QuickBird imagery, independent of mapping technique. Geometric properties of the mapping indicated that the NDVI threshold produced smaller patch sizes, but that overall patch size distributions were similar. Tree canopy mapping using SPOT 5 imagery and an NDVI threshold approach performed poorly, however acceptable thematic accuracies were obtained from the object based image analysis. Although patch sizes were generally larger than those mapped from the QuickBird image data, patch size distributions mapped with object based image analysis of SPOT 5 have a similar form to the QuickBird mapping. This indicates that SPOT 5 imagery is suitable for regional studies of tree canopy cover patterns. 相似文献
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E. H. Wickens H. C. Woodrow D. W. Proctor J. E. Farrow I. Newton C. D. Burnside J. A. Allan J. Taylor 《The Photogrammetric Record》1985,11(65):473-492
The XVth International Congress of Photogrammetry and Remote Sensing, organised by the International Society for Photogrammetry and Remote Sensing, was held at Rio Centro. Rio de Janeiro from 17th to 29th June, 1984. Reports on the activities of the seven technical Commissions as well as on the Exhibition and the General Assembly were given to a meeting of the Photogrammetric Society on 16th October, 1984. Papers were published in the International Archives of Photogrammetry and Remote Sensing 25. 相似文献
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Google Earth遥感影像图具有直观、免费、时效性强等特点,已逐渐应用于工程领域。分析了几何精校正的原理和方法;探讨了Web Mercator投影以及ArcGIS、ENVI用于GE遥感影像精校正的具体实施步骤和精度,以期为GE用于工程实践提供思路与方法。 相似文献
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C. D. Burnside Secretary I. J. Dowman D. W. Proctor J. E. Farrow K. B. Atkinson D. A. Tait J. A. Allan R. A. Baldwin 《The Photogrammetric Record》1989,13(73):3-25
The XVIth International Congress of Photogrammetry and Remote Sensing, organised by the International Society for Photogrammetry and Remote Sensing, was held in the Kyoto International Conference Hall from 1st to 10th July, 1988. The activities of the seven technical commissions of ISPRS were described at a meeting of the Photogrammetric Society on 18th October, 1988. The meeting also heard about the Congress Exhibition and the deliberations of the General Assembly during the Congress. Papers from the Congress were published in the International Archives of Photogrammetry and Remote Sensing 27. 相似文献
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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
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This paper describes a framework for an image processing procedure for operational agricultural crop area estimation. This operational framework has been conceived within the development of an Advanced Agricultural Information System (AAIS) for the “Regione del Veneto “ (RdV ‐ Veneto Region) in northeastern Italy. The objective of this program is to develop the ability to generating timely and accurate area estimates and production information for four major agricultural crops: soybeans, sugar beets, corn, and small grains. AAIS uses state of the art methods in remote sensing and geographic information systems (GIS) technology and integrates a variety of data types including satellite imagery. This paper describes the methodology developed for image and ancillary data processing for the production of crop area statistics. Using a combination of standard unsupervised classification and GIS operations that incorporate knowledge about the agricultural system, a “sequential masking” classification procedure was derived. This sequential masking procedure yielded crop classification accuracies that at the study site level range between 76% and 99% depending on the crop under study. We believe that classification accuracies will improve with full system implementation, along with the incorporation of new and/or improved thematic information and operational experience using AAIS‐based estimation. 相似文献
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V. K. Pandey S. N. Panda N. S. Raghuwanshi S. Sudhakar 《Journal of the Indian Society of Remote Sensing》2006,34(2):143-152
Delineation of Banikdih Agricultural watershed in Eastern India was carried out and various watershed parameters were extracted
using Geographic Information System (GIS) and Remote Sensing. Digital Elevation Model (DEM) was developed with a contour interval
of 10 m in the scale of 1:25000 using ARC/INFO modules. Sub watershed, drainage, slope, aspect, flow direction, soil series,
soil texture, and soil class maps were independently generated and they were properly registered and integrated for analysis.
The watershed was digitally delineated using AVSWAT model that couples hydrological model and GIS with appropriate threshold
value of cell size. Subsequently, stream characteristics through the interface were generated. Indian Remote Sensing Satellite
IRS-1D LISS-III data pertaining to the period of October 29, 1998 and October 23, 2000 was used to develop land use/land cover
thematic map using ERDAS- 8.4 version image processing software. Eight major land use/land cover classes namely water body,
lowland paddy, upland paddy, fallow land, upland crop (non-paddy crops), settlement, open mixed forest, and wasteland were
segregated through digital image processing techniques using maximum likelihood algorithm. The information generated would
be of immense help in hydrological modeling of watershed for prediction of runoff and sediment yield, thereby providing necessary
inputs for developing suitable developmental management plans with sound scientific basis. 相似文献
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针对目前矿山开发遥感调查多是依赖国外影像且监管手段滞后的问题,本文在矿产资源开发遥感调查基础上,以四川省攀枝花市红格钒钛磁铁矿区为例,基于资源三号卫星影像,研究了国产高分辨率卫星影像在矿山开发遥感调查中应用的可行性。同时,利用C#语言,研发了矿山开发动态监测系统,提高了矿山开发遥感调查的实时性与可靠性,提升了矿山开发监管工作的效率。 相似文献
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Richard Lucas Katie MedcalfAlan Brown Peter BuntingJohanna Breyer Dan Clewley Steve KeyworthPhilippa Blackmore 《ISPRS Journal of Photogrammetry and Remote Sensing》2011,66(1):81-102
The Phase 1 Survey is the most comprehensive and widely used national level map of semi-natural habitats in Wales. However, the survey was based largely on field survey and was conducted over several decades, before being completed in 1997. Given that resources for a repeat survey were limited, this study has used an object-orientated rule-based classification implemented within eCognition of multi-temporal satellite sensor data acquired between 2003 and 2006 to map semi-natural habitats and agricultural land across Wales, thereby allowing a progressive update of the Phase 1 Survey. The classification of objects to Phase 1 habitat classes was undertaken in two steps; firstly the landscape of Wales was divided into objects using orthorectified SPOT-5 High Resolution Geometric (HRG) reflectance data (10 m spatial resolution) and Land Parcel Information System (LPIS) boundaries. A rule-base was then developed to progressively discriminate and map the distribution of 105 sub-habitats across Wales based on time-series of SPOT HRG, Terra-1 Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) and Indian Remote Sensing Satellite (IRS) LISS-3 data, derived datasets (e.g., vegetation indices, fractional images) and ancillary information (e.g., topography). The rules coupled knowledge of ecology and the information content of these remote sensing data using a combination of thresholds, Boolean operations and fuzzy membership functions. A second rule-base was then developed to translate the more detailed sub-habitat classification to Phase 1 habitat classes. Indicative accuracies of the revised Phase 1 mapping, based on comparisons with the later Phase 2 survey (for selected habitats), were >80% overall and typically between 70% and 90% for many classes. Through this exercise, Wales has become the first country in Europe to produce a national map of habitats (as opposed to land cover) through object-orientated classification of satellite sensor data. Furthermore, the approach can be adapted to allow continual monitoring of the extent and condition of habitats and agricultural land. 相似文献
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过去十年,随着卫星航空信息日渐丰富,作为国家重点攻关项目的遥感技术不断开拓了应用的新领域,初步形成了一个新的高科技信息服务行业。“八五”期间,遥感又列为重点项目,预期气象卫星信息的开发与应用,将会再次出现高潮。在资源卫星群星灿烂,航空遥感持续发展的形势下,需要充分利用现有设备潜力和所取得的技术进步,集中力量,研制大容量存储,实时传输和快速处理功能的智能化技术系统。这样才能适应防灾,估产为主要目标,并兼顾开放城市及全球研究的需求。 相似文献