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IEEE 1999 International Geoscience and Remote Sensing Symposium. IGARSS'99 (Cat. No.99CH36293)最新文献

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Interactive learning in remote-sensing image databases 遥感影像数据库中的交互式学习
IEEE 1999 International Geoscience and Remote Sensing Symposium. IGARSS'99 (Cat. No.99CH36293) Pub Date : 1999-06-28 DOI: 10.1109/IGARSS.1999.771631
M. Schroeder
{"title":"Interactive learning in remote-sensing image databases","authors":"M. Schroeder","doi":"10.1109/IGARSS.1999.771631","DOIUrl":"https://doi.org/10.1109/IGARSS.1999.771631","url":null,"abstract":"In this paper we present a concept of interactive learning in an intelligent remote sensing image database that allows users to query by image content. First, an application-free description of the image content is generated at data insertion. This description should globally capture the structures in the image data. Then, in an interactive step, users of different application fields can define their specific semantic labels based on the application-free representation and use them for later database queries. Such a system might help users of all levels of expertise-both experts and novice users-to find images in the archive that are useful for their particular remote sensing application. We briefly review a hierarchical description of the image content and then sketch the basic step of Bayesian inference used for interactive learning. We present one example of this interactive learning taken from our test database consisting of about 1000 small 1024/spl times/1024 images derived from 11 geocoded Landsat TM scenes.","PeriodicalId":169541,"journal":{"name":"IEEE 1999 International Geoscience and Remote Sensing Symposium. IGARSS'99 (Cat. No.99CH36293)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114894486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Assessment of speckle reduction filters for automatic detection of small/thin features [in SAR images] 用于自动检测小/薄特征的散斑减少滤波器的评估[在SAR图像中]
IEEE 1999 International Geoscience and Remote Sensing Symposium. IGARSS'99 (Cat. No.99CH36293) Pub Date : 1999-06-28 DOI: 10.1109/IGARSS.1999.774616
T. Sakurai-Amano, J. Iisaka
{"title":"Assessment of speckle reduction filters for automatic detection of small/thin features [in SAR images]","authors":"T. Sakurai-Amano, J. Iisaka","doi":"10.1109/IGARSS.1999.774616","DOIUrl":"https://doi.org/10.1109/IGARSS.1999.774616","url":null,"abstract":"Evaluates the effectiveness of several speckle reduction filters in extracting small/thin features in SAR images. The filters were tested on various types of bright and dark features in observed images instead of simulated images. The filters were required to preserve contrast between the feature and its immediate background, as well as reduce speckle in the image. Based on the results of the tests, the authors found that the Small Feature Preserving (SFP) filter was best for extracting bright features, and that the Sigma filter was best for extracting dark features.","PeriodicalId":169541,"journal":{"name":"IEEE 1999 International Geoscience and Remote Sensing Symposium. IGARSS'99 (Cat. No.99CH36293)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115089001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Elimination of bottom effects in SeaWiFS data of shallow water areas in the Pomeranian Bight of the Baltic Sea 波罗的海波美拉尼亚湾浅水区SeaWiFS数据中底部效应的消除
IEEE 1999 International Geoscience and Remote Sensing Symposium. IGARSS'99 (Cat. No.99CH36293) Pub Date : 1999-06-28 DOI: 10.1109/IGARSS.1999.774611
T. Ohde, H. Siegel
{"title":"Elimination of bottom effects in SeaWiFS data of shallow water areas in the Pomeranian Bight of the Baltic Sea","authors":"T. Ohde, H. Siegel","doi":"10.1109/IGARSS.1999.774611","DOIUrl":"https://doi.org/10.1109/IGARSS.1999.774611","url":null,"abstract":"Water constituent concentrations like phytoplankton pigment can be derived from measured reflectances in the visible spectrum of ocean colour satellite sensors. The reflectances can be disturbed by the bottom influence in shallow water areas depending on the water depth, the transmission of the water column, the reflectance of the water, the reflectivity of the bottom materials and the spectral range of the different sensor channels. The influence of the sea bottom on the spectral reflectances is studied for the example of the shallow Oder Bank in the Pomeranian Bight of the south-western Baltic Sea. The conditions of strong bottom influence are discussed on the basis of reflectance model calculations in the studied area. The procedure for the identification and elimination of bottom disturbed pixels is presented and explained with the example of one Sea-viewing Wide Field-of-view Sensor (SeaWiFS) scene.","PeriodicalId":169541,"journal":{"name":"IEEE 1999 International Geoscience and Remote Sensing Symposium. IGARSS'99 (Cat. No.99CH36293)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117009847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
SAR capabilities for alpine hydrology 高山水文SAR能力
IEEE 1999 International Geoscience and Remote Sensing Symposium. IGARSS'99 (Cat. No.99CH36293) Pub Date : 1999-06-28 DOI: 10.1109/IGARSS.1999.775059
D. Floricioiu, T. Nagler, H. Rott
{"title":"SAR capabilities for alpine hydrology","authors":"D. Floricioiu, T. Nagler, H. Rott","doi":"10.1109/IGARSS.1999.775059","DOIUrl":"https://doi.org/10.1109/IGARSS.1999.775059","url":null,"abstract":"Applications of SAR data for monitoring snow extent and soil moisture in alpine basins are investigated. The studies are based on C-band data from ERS SAR and Radarsat SAR from 1996 to 1998 and on polarimetric SIR-C/X-SAR data from April and October 1994. An algorithm for mapping wet snow is described which applies change detection technique to repeat pass SAR images. Effects of different look angles are studied using ERS SAR data (look angle 19/spl deg/) and Radarsat SAR Beam Mode S7 (look angle 40/spl deg/) data. In a case study the temporal change of the snow extent during the melting season 1998 is derived for a drainage basin in the Alps. Time series of C-band backscatter of alpine surface classes are studied to investigate the capabilities for monitoring soil moisture changes.","PeriodicalId":169541,"journal":{"name":"IEEE 1999 International Geoscience and Remote Sensing Symposium. IGARSS'99 (Cat. No.99CH36293)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117136298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Detection of singular corner reflectors in residential and mountainous areas from SAR images 居住区和山区SAR图像中奇异角反射体的检测
IEEE 1999 International Geoscience and Remote Sensing Symposium. IGARSS'99 (Cat. No.99CH36293) Pub Date : 1999-06-28 DOI: 10.1109/IGARSS.1999.774662
T. Sakurai-Amano, S. Kobayashi, N. Fujii
{"title":"Detection of singular corner reflectors in residential and mountainous areas from SAR images","authors":"T. Sakurai-Amano, S. Kobayashi, N. Fujii","doi":"10.1109/IGARSS.1999.774662","DOIUrl":"https://doi.org/10.1109/IGARSS.1999.774662","url":null,"abstract":"In a mountainous and highly populated country like Japan, corner reflectors frequently must be placed near confounding objects. A procedure to detect singular corner reflectors in such situations is described. It is found that the initial reduction of speckle by the Enhanced SFP filter greatly facilitated the detection of these corner reflectors from both JERS-1 SAR images and ERS-2 images.","PeriodicalId":169541,"journal":{"name":"IEEE 1999 International Geoscience and Remote Sensing Symposium. IGARSS'99 (Cat. No.99CH36293)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121992733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Studies of sea-ice motion in the Laptev Sea with the use of satellite remote sensing and numerical modelling 利用卫星遥感和数值模拟研究拉普捷夫海的海冰运动
IEEE 1999 International Geoscience and Remote Sensing Symposium. IGARSS'99 (Cat. No.99CH36293) Pub Date : 1999-06-28 DOI: 10.1109/IGARSS.1999.775017
V. Alexandrov, T. Martin, J.S. Kolatschek, H. Eicken, M. Kreyscher, A. Makshtas
{"title":"Studies of sea-ice motion in the Laptev Sea with the use of satellite remote sensing and numerical modelling","authors":"V. Alexandrov, T. Martin, J.S. Kolatschek, H. Eicken, M. Kreyscher, A. Makshtas","doi":"10.1109/IGARSS.1999.775017","DOIUrl":"https://doi.org/10.1109/IGARSS.1999.775017","url":null,"abstract":"Seasonal and interannual variability of ice drift in the Laptev Sea and ice exchange with the Arctic Ocean have been investigated using remote sensing data, a large-scale dynamic-thermodynamic numerical sea ice model and semi-empirical method. During the period 1979-1995 sea ice was exported from the Laptev Sea with maximum export occuring in February and minimum in August. The average winter ice outflow during this period was equal to 482700 km/sup 2/. Estimates of ice exchange between the northern and southern parts of the Laptev Sea during the period 1936 to 1996 exhibited a strong interannual variability, but did not reveal significant trends.","PeriodicalId":169541,"journal":{"name":"IEEE 1999 International Geoscience and Remote Sensing Symposium. IGARSS'99 (Cat. No.99CH36293)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116836464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An L-band direct-sampling digital radiometer: design and performance evaluation 一种l波段直接采样数字辐射计:设计与性能评价
IEEE 1999 International Geoscience and Remote Sensing Symposium. IGARSS'99 (Cat. No.99CH36293) Pub Date : 1999-06-28 DOI: 10.1109/IGARSS.1999.773458
M. Fischman, A. England
{"title":"An L-band direct-sampling digital radiometer: design and performance evaluation","authors":"M. Fischman, A. England","doi":"10.1109/IGARSS.1999.773458","DOIUrl":"https://doi.org/10.1109/IGARSS.1999.773458","url":null,"abstract":"This paper examines the noise characteristics of a direct RF sampling receiver whose architecture is suitable for high resolution aperture synthesis radiometry. The authrs have designed a 1.4 GHz direct-sampling digital radiometer (DSDR) to verify the discrete-time statistical model of the receiver and to evaluate current analog-to-digital converter technology. Several tests characterize the dynamic range and noise-equivalent sensitivity (NE/spl Delta/T) caused by quantization, finite data sampling, and variations in signal bias. The results of a benchmark case study suggest that, with DSDR configured in a total power mode, a sensitivity of 0.2 K is attainable for Earth remote sensing applications like soil moisture retrieval.","PeriodicalId":169541,"journal":{"name":"IEEE 1999 International Geoscience and Remote Sensing Symposium. IGARSS'99 (Cat. No.99CH36293)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125897603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Large beamwidth spaceborne SAR processing using chirp scaling 基于啁啾尺度的大波束宽度星载SAR处理
IEEE 1999 International Geoscience and Remote Sensing Symposium. IGARSS'99 (Cat. No.99CH36293) Pub Date : 1999-06-28 DOI: 10.1109/IGARSS.1999.773555
D. Chibiao, Peng Hai-liang, Wu Yirong, Jiang Hongjiang
{"title":"Large beamwidth spaceborne SAR processing using chirp scaling","authors":"D. Chibiao, Peng Hai-liang, Wu Yirong, Jiang Hongjiang","doi":"10.1109/IGARSS.1999.773555","DOIUrl":"https://doi.org/10.1109/IGARSS.1999.773555","url":null,"abstract":"The accurate effective platform velocity and the effective closest approach range should be used to get a high resolution image when the chirp scaling algorithm (CSA) is employed in spaceborne SAR processing, especially, in the large beamwidth and squint modes. In this paper the two effective parameters are derived as a function of the Doppler centroid and the Doppler rate. Therefore, the classical clutterlock and autofocus methods can be used in CSA to get precise estimates of the effective parameters. Simulation results show that CSA using the effective velocity and closest slant range is suitable for L-band large beamwidth spaceborne SAR processing.","PeriodicalId":169541,"journal":{"name":"IEEE 1999 International Geoscience and Remote Sensing Symposium. IGARSS'99 (Cat. No.99CH36293)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126164269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
A universal data acquisition system for radar applications 用于雷达应用的通用数据采集系统
IEEE 1999 International Geoscience and Remote Sensing Symposium. IGARSS'99 (Cat. No.99CH36293) Pub Date : 1999-06-28 DOI: 10.1109/IGARSS.1999.773389
M. Jenett, R. Kozshin, K. Schunemann, D. Vavriv, V. Vinogradov
{"title":"A universal data acquisition system for radar applications","authors":"M. Jenett, R. Kozshin, K. Schunemann, D. Vavriv, V. Vinogradov","doi":"10.1109/IGARSS.1999.773389","DOIUrl":"https://doi.org/10.1109/IGARSS.1999.773389","url":null,"abstract":"A universal data acquisition system for radar applications is described. Advances of the object programming and the multithread approach for the development of such systems are demonstrated. Examples are given of the application of the developed data acquisition system for such different radar systems as an airborne side-looking dual frequency radar for remote sensing applications and coherent 36 and 94 GHz radar systems for cloud studies.","PeriodicalId":169541,"journal":{"name":"IEEE 1999 International Geoscience and Remote Sensing Symposium. IGARSS'99 (Cat. No.99CH36293)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128411943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
A possibility of various interpretations of polarimetric SAR signatures analyzed from propagation and transmission points of view 从传播和传输的角度分析了极化SAR信号的各种解释的可能性
IEEE 1999 International Geoscience and Remote Sensing Symposium. IGARSS'99 (Cat. No.99CH36293) Pub Date : 1999-06-28 DOI: 10.1109/IGARSS.1999.771609
Z. Czyz
{"title":"A possibility of various interpretations of polarimetric SAR signatures analyzed from propagation and transmission points of view","authors":"Z. Czyz","doi":"10.1109/IGARSS.1999.771609","DOIUrl":"https://doi.org/10.1109/IGARSS.1999.771609","url":null,"abstract":"Derivation of the relation called the 'reversal' transformation, joining matrices in the two alignments, is presented. To arrive at the solution, a concept of 'polarization and spatial phase' vectors for antennae and waves, different from complex antenna heights and complex wave amplitudes, has been applied. For Sinclair and Jones matrices, describing the same physical phenomenon of nondepolarizing scattering, two different Poincare/spl acute/ sphere models have been proposed based on decomposition of a Sinclair matrix into two transformations of inversion and rotation of the Poincare sphere of incident polarizations. For the Jones matrix model another Sinclair matrix has been determined followed by an additional orthogonality transformation. Such a difference in construction of the two models can explain diverse physical interpretations of their operation. Limited number of simple formulae describing scattering will be obtained when applying to radar polarimetry a special 'engineering approach' introduced in the paper.","PeriodicalId":169541,"journal":{"name":"IEEE 1999 International Geoscience and Remote Sensing Symposium. IGARSS'99 (Cat. No.99CH36293)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128754239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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