IGARSS 2001. Scanning the Present and Resolving the Future. Proceedings. IEEE 2001 International Geoscience and Remote Sensing Symposium (Cat. No.01CH37217)最新文献
{"title":"Multi-sensor data classification in remote sensing using MRF regional growing algorithm","authors":"Sanghoon Lee, Asook Suh, Myunghee Jung","doi":"10.1109/IGARSS.2001.978194","DOIUrl":"https://doi.org/10.1109/IGARSS.2001.978194","url":null,"abstract":"This paper studies a multi-stage method using hierarchical clustering for unsupervised image classification to classify the land-cover using remotely-sensed data from multiple sensors. The multi-stage method performs region-growing segmentation using a hierarchical clustering procedure which makes use of the spatial contextual information by characterizing geophysical connectedness of digital image structure with Markov random field.","PeriodicalId":135740,"journal":{"name":"IGARSS 2001. Scanning the Present and Resolving the Future. Proceedings. IEEE 2001 International Geoscience and Remote Sensing Symposium (Cat. No.01CH37217)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122050238","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}
{"title":"Vicarious calibration of MODIS using Railroad Valley Playa","authors":"K. Thome, N. Smith, K. Scott","doi":"10.1109/IGARSS.2001.976794","DOIUrl":"https://doi.org/10.1109/IGARSS.2001.976794","url":null,"abstract":"The Remote Sensing Group at the University of Arizona has used ground-based test sites for the vicarious calibration of airborne and satellite-based sensors. Past work has focused on high-spatial-resolution sensors such as Landsat-7 Enhanced Thematic Mapper Plus (ETM+). Application of these methods to the Moderate Resolution Imaging Spectroradiometer (MODIS) with its lower spatial resolution poses a challenge for vicarious calibration. This work presents previous results using two vicarious techniques, the reflectance-based approach and cross-calibration to ETM+, at Railroad Valley Playa, Nevada. The modifications needed for the reflectance-based approach for application to MODIS are presented as is the method of cross-calibration to ETM+. This cross-calibration takes into account the changes in solar zenith angle due to the 40-minute separation in overpass times of the two sensors which view the test sites on the same day with the same view angle. A sensitivity study shows that these two vicarious calibration approaches, when applied to MODIS, should have uncertainty less than 5% for bands in the solar reflective not affected by atmospheric absorption. Results from these two methods agree with radiances reported by MODIS to better than 7% in the solar reflective for bands not affected by atmospheric absorption.","PeriodicalId":135740,"journal":{"name":"IGARSS 2001. Scanning the Present and Resolving the Future. Proceedings. IEEE 2001 International Geoscience and Remote Sensing Symposium (Cat. No.01CH37217)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122076031","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}
{"title":"Improved texture recognition of SAR sea ice imagery by data fusion of MRF features with traditional methods","authors":"David A Clausi","doi":"10.1109/IGARSS.2001.976781","DOIUrl":"https://doi.org/10.1109/IGARSS.2001.976781","url":null,"abstract":"Image texture interpretation is an important aspect of the computer-assisted discrimination of SAR sea ice imagery. Co-occurrence probabilities are the most common approach to solve this problem. However, other texture feature extraction methods exist that have not been fully studied for their ability to interpret SAR sea ice imagery. Gabor filters and Markov random fields (MRF) are two such methods considered. Classification and significance level testing shows that co-occurrence probabilities classify the data with the highest classification rate, with Gabor filters a close second. MRF results significantly lag Gabor and co-occurrence results. However, the MRF features are uncorrelated with respect to co-occurrence and Gabor features. The fused co-occurrence/MRF feature set achieves higher performance.","PeriodicalId":135740,"journal":{"name":"IGARSS 2001. Scanning the Present and Resolving the Future. Proceedings. IEEE 2001 International Geoscience and Remote Sensing Symposium (Cat. No.01CH37217)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122196452","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}
{"title":"A multi-channel approach to Greenland snowmelt estimation","authors":"J. Pack, M. Jensen","doi":"10.1109/IGARSS.2001.977072","DOIUrl":"https://doi.org/10.1109/IGARSS.2001.977072","url":null,"abstract":"Snowmelt monitoring on the Greenland ice sheet is important as an indicator of global climate change. A previous study employed a cross-polarized gradient ratio (XPGR) method to determine melt extent using two channels of SSM/I data. In this work, principal component analysis is presented as a method of characterizing such snowmelt using all seven SSM/I channels. A matrix is given for the projection of the seven channel data onto a two dimensional subspace wherein the melt/refreeze cycle is clear. Evidence is presented for the use of all seven channels to quantify melt intensity as well as duration.","PeriodicalId":135740,"journal":{"name":"IGARSS 2001. Scanning the Present and Resolving the Future. Proceedings. IEEE 2001 International Geoscience and Remote Sensing Symposium (Cat. No.01CH37217)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122212005","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}
{"title":"Reconstruction of 3D urban model using range image and aerial image","authors":"K. Fujii, T. Arikawa","doi":"10.1109/IGARSS.2001.977119","DOIUrl":"https://doi.org/10.1109/IGARSS.2001.977119","url":null,"abstract":"This paper introduces a method that utilizes airborne laser range images and aerial images for the 3D reconstruction of urban models. The method consists of three procedures: object extraction and object modeling using range images, and texture mapping using aerial images. Objects are extracted from range images by edge analysis and classification through the use of vertical geometric patterns. Our approach also uses the automatic registration of images onto 3D models for texture mapping. The method is based on edge pair extraction as matching features and displacement determination by voting. Experimental results show that 3D reconstruction in a test area is generally successful.","PeriodicalId":135740,"journal":{"name":"IGARSS 2001. Scanning the Present and Resolving the Future. Proceedings. IEEE 2001 International Geoscience and Remote Sensing Symposium (Cat. No.01CH37217)","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116623721","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}
Adriano Camps, I. Corbella, M. Vall-llossera, R. Villarino, L. Enrique, J. Font, A. Julia, C. Gabarró, J. Etchetto, J. Boutin, A. Weill, F. Torres, N. Duffo, R. Niclòs, V. Caselles, P. Wursteisen, M. Martín-Neira
{"title":"Sea surface emissivity observations at L-band: first preliminary results of the WInd and Salinity Experiment WISE-2000","authors":"Adriano Camps, I. Corbella, M. Vall-llossera, R. Villarino, L. Enrique, J. Font, A. Julia, C. Gabarró, J. Etchetto, J. Boutin, A. Weill, F. Torres, N. Duffo, R. Niclòs, V. Caselles, P. Wursteisen, M. Martín-Neira","doi":"10.1109/IGARSS.2001.976848","DOIUrl":"https://doi.org/10.1109/IGARSS.2001.976848","url":null,"abstract":"This paper presents the first measurements processed from the data acquired with the L-band AUtomatic RAdiometer (LAURA) during the WInd and Salinity Experiment (WISE-2000). Experimental results are compared to a sea surface emissivity model developed by the Polytechnic University of Catalonia (UPC). The sensitivity of the brightness temperatures at vertical and horizontal polarizations to wind speed are discussed, as well as the weak azimuthal signature found.","PeriodicalId":135740,"journal":{"name":"IGARSS 2001. Scanning the Present and Resolving the Future. Proceedings. IEEE 2001 International Geoscience and Remote Sensing Symposium (Cat. No.01CH37217)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128310483","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}
{"title":"The Polarization Diversity Lidar: a dual-wavelength, high-resolution, scanning lidar for cloud and aerosol research","authors":"K. Sassen","doi":"10.1109/IGARSS.2001.978272","DOIUrl":"https://doi.org/10.1109/IGARSS.2001.978272","url":null,"abstract":"The unique cloud and aerosol research capabilities of the Polarization Diversity Lidar system are described, and outstanding data display examples will be illustrated.","PeriodicalId":135740,"journal":{"name":"IGARSS 2001. Scanning the Present and Resolving the Future. Proceedings. IEEE 2001 International Geoscience and Remote Sensing Symposium (Cat. No.01CH37217)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128416950","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}
{"title":"Smoothing speckled SAR images by using maximum homogeneous region filters: an improved approach","authors":"J. Nicolas, F. Tupin, H. Maître","doi":"10.1109/IGARSS.2001.976892","DOIUrl":"https://doi.org/10.1109/IGARSS.2001.976892","url":null,"abstract":"Because the speckle phenomenon corrupts the visibility of SAR images, many techniques have been proposed to improve the data. In this paper, we present an improved first step in the filtering process by using adaptively tailored windows in order to select maximum homogeneous regions. This selection is based on a classical growing region method tuned by the variations of the local estimate of the equivalent number of looks L: dealing with an analytical expression for the variance of L-estimator, the proposed segmentation seems to be more realistic than the initial method.","PeriodicalId":135740,"journal":{"name":"IGARSS 2001. Scanning the Present and Resolving the Future. Proceedings. IEEE 2001 International Geoscience and Remote Sensing Symposium (Cat. No.01CH37217)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128697184","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}
{"title":"Major conclusions relating to the Katse Dam differential InSAR study","authors":"G.S. Doyle, A. Wilkinson, M. Inggs","doi":"10.1109/IGARSS.2001.977901","DOIUrl":"https://doi.org/10.1109/IGARSS.2001.977901","url":null,"abstract":"The Katse Dam in Lesotho, which was completed in 1997, is the deepest dam on the African continent (180 m). Lithological modelling prior to the dam's construction had indicated that the loading effect of the reservoir on the Earth's crust would be well within the imaging capabilities of ERS InSAR, both in terms of vertical surface movement and lateral extent. A study, funded by The South African Water Research Commission, was started in 1996, the aim of which was to derive the crustal deformation field by differential InSAR, and to compare this with hypothesised models of the Lesotho lithosphere, thereby improving the models used for seismic risk assessments in the Lesotho Highlands Water Scheme. The lack of independent height data and the alpine terrain made the removal of the topographic phase component from interferograms very difficult. Fortunately however, surprisingly good phase coherence as well as a short baseline between images acquired as far apart as three years, meant that a conclusion could be reached in spite of the topographic problems, albeit a negative one. In a short baseline (21m) interferogram generated from a pair of ERS images acquired before and after the first filling of the Katse reservoir, no clear evidence of differential movement was apparent. Conventional geodetic levelling conducted at the dam showed that the actual vertical deformation was an order of magnitude less than that anticipated through the modelling. The basic implication here being that the flexural thickness of the Lesotho crust is greater than previously thought.","PeriodicalId":135740,"journal":{"name":"IGARSS 2001. Scanning the Present and Resolving the Future. Proceedings. IEEE 2001 International Geoscience and Remote Sensing Symposium (Cat. No.01CH37217)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128259788","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}
S. Lehner, H. Gunther, J. Horstmann, M. Bao, J. Schulz-Stellenfleth
{"title":"Joint along-across track interferometry of ocean waves","authors":"S. Lehner, H. Gunther, J. Horstmann, M. Bao, J. Schulz-Stellenfleth","doi":"10.1109/IGARSS.2001.976231","DOIUrl":"https://doi.org/10.1109/IGARSS.2001.976231","url":null,"abstract":"In the framework of the EuroROSE project high resolution ocean wave, wind and current fields were measured at the North Coast of Spain by simultaneous data acquisitions of spaceborne, airborne, and in situ instruments. The objective of the project was to provide a guidance system for ships entering the harbour of Gijon, by monitoring and forecasting wind, waves and currents. This paper presents first results of a new airborne three antenna interferometric synthetic aperture radar (InSAR) system which provides information on both sea surface elevation and motion. The system transmits and receives signals with a combination of three antennas, whereby two are placed along flight direction and the third in across flight direction. This configuration allows, for the first time, to acquire along and across track InSAR data simultaneously. The system was flown in different flight patterns with simultaneous measurements of directional wave spectra, wind and currents fields taken by the HF-radar WERA, the radar based wave monitoring system WaMoSII, the ERS-2 SAR and a waverider buoy.","PeriodicalId":135740,"journal":{"name":"IGARSS 2001. Scanning the Present and Resolving the Future. Proceedings. IEEE 2001 International Geoscience and Remote Sensing Symposium (Cat. No.01CH37217)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128379305","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}