| 336 | 20 | 158 |
| 下载次数 | 被引频次 | 阅读次数 |
提出一种基于奇异值分解(Singular Value Decomposition,SVD)的ETM+遥感蚀变信息提取方法,有效地避免了PCA方法在数据正态标准化过程中造成信息丢失的问题,确保了矿物光谱的特征性;采用半自适应的异常后处理技术,计算初始蚀变信息与目标矿物的相似度以确定最优异常分割阈值,使得提取的异常信息更具针对性。以青海省五龙沟金矿勘查区为研究区,提取与金矿化相关的铁染蚀变和羟基异常信息。结果表明,该方法提取的蚀变信息与地层、侵入岩和断裂构造吻合较好,比PCA方法提取精度更高,应用效果更好,为五龙沟地区蚀变信息提取和金矿勘查提供了新的思路。
Abstract：A new approach was presented to extract alteration information of ETM+imagery based on singular value decomposition(SVD),emphasizing initial characterization of RS data and effectively avoiding the problem of information-loss which caused by normal standardization of the data compared to PCA.The optimal abnormal segmentation parameter is determined by calculating the spectral similarity between the initial alteration information and target mineral.The authors selected the Gold Deposit in Wulonggou of Qinghai Province as study area,extracted the information of altered minerals from the ETM+image of the study area.Five marked targets of altered rocks in the figures of recognition results were demonstrated,and the result showed that the identification results of SVD were consistent with the field ground objects.A comparison between the alteration zones obtained by PCA shows that much useless information was extracted.In the identification of altered minerals using ETM+data,the recognition results obtained by SVD have higher relibility than the results obtained by PCA.
[1]王润生,熊盛青,聂洪峰,等.遥感地质勘查技术与应用研究[J].地质学报,2011,85(11):1699-1743.
[2]POURNAMDARI M,HASHIM M,POUR A B.Spectral transformation of ASTER and Landsat TM bands for lithological mapping of Soghan ophiolite complex,south Iran[J].Advances in Space Research,2014,54(4):694-709.
[3]TAYEBI M,HASHEMI TANGESTANI M,VINCENT R.Alteration mineral mapping with ASTER data by integration of coded spectral ratio imaging and SOM neural network model[J].Turkish Journal of Earth Sciences,2014,23(6):627-644.
[4]NAVALGUND R,JAYARAMAN V,ROY P.Remote sensing applications:An overview[J].Current Science,2007,93(12):1747-1766.
[5]POUR A B,HASHIM M,GENDEREN J V.Detection of hydrothermal alteration zones in a tropical region using satellite remote sensing data:Bau goldfield,Sarawak,Malaysia[J].Ore Geology Reviews,2013,54(8):181-196.
[6]MIA M B,NISHIJIMA J,FUJIMITSU Y.Exploration and monitoring geothermal activity using Landsat ETM+images:A case study at Aso volcanic area in Japan[J].Journal of Volcanology&Geothermal Research,2014,275:14-21.
[7]XU Y,MA H,PENG S.Study on identification of altered rock in hyperspectral imagery using spectrum of field object[J].Ore Geology Reviews,2014,56(1):584-595.
[8]SADEGHI B,KHALAJMASOUMI M,AFZAL P,et al.Using ETM+and ASTER sensors to identify iron occurrences in the Esfordi 1:100,000mapping sheet of Central Iran[J].Journal of African Earth Sciences,2013,85(2):103-114.
[9]EL-MAGD I A,MOHY H,BASTA F.Application of remote sensing for gold exploration in the Fawakhir area,Central Eastern Desert of Egypt[J].Arabian Journal of Geosciences,2014,8:1-14.
[10]MIA M B,FUJIMITSU Y.Mapping hydrothermal altered mineral deposits using Landsat 7ETM+image in and around Kuju volcano,Kyushu,Japan[J].Journal of Earth System Science,2012,121(4):1049-1057.
[11]路轩轩,朱谷昌,邹林,等植被覆盖区的遥感蚀变信息提取研究——以老挝南部某金矿区为例[J].遥感信息,2014,29(5):85-89.
[12]徐元进,胡光道,张振飞.基于光谱整体形态和局部吸收谷位置的高光谱遥感图像地物识别[J].武汉大学学报(信息科学版),2010,7(7):868-872.
[13]LOUGHLIN W P.Principal Component Analysis for alteration mapping[J].Photogrammetric Engineering and Remote Sensing,1991(57):1163-1169.
[14]张远飞,吴健生.基于遥感图像提取矿化蚀变信息[J].有色金属矿产与勘查,1999,6:604-606.
[15]张玉君,杨建民,陈薇.ETM~+(TM)蚀变遥感异常提取方法研究与应用——地质依据和波谱前提[J].国土资源遥感,2002,4(4):30-36.
[16]POUR A B,HASHIM M.Identifying areas of high economicpotential copper mineralization using ASTER data in the Urumieh-Dokhtar Volcanic Belt,Iran[J].Advances in Space Research,2012,49(4):753-769.
[17]徐永智,华惠川.对主成分分析三点不足的改进[J].科技管理研究,2009(6):128-130.
[18]陈述云,张崇甫.对多指标综合评价的主成分分析方法的改进[J].统计研究,1995(1):35-38.
[19]张远飞,袁继明,朱谷昌,等.遥感蚀变信息提取中的干扰因素研究与消除对策[J].遥感信息,2010(6):19-25.
[20]WALL M E,RECHTSTEINER A,ROCHA L M.Singular value decomposition and principal component analysis[J].A Practical Approach to Microarray Data Analysis,2002(5):91-109.
[21]CLARK C,CLARK A.Spectral identification by singular value decomposition[J].International Journal of Remote Sensing,1998,19(12):2317-2329.
[22]MEI S,HE M,WANG Z,et al.Spectral-spatial endmember extraction by singular value decomposition for AVIRIS data[A].Industrial Electronics and Applications,2009[C].ICIEA 2009.4th IEEE Conference on.IEEE,2009.1472-1476.
[23]NARESH K M,SESHASAI M,ROY P,et al.A new hybrid spectral similarity measure for discrimination among Vigna species[J].International Journal of Remote Sensing,2011,32(14):4041-4053.
基本信息:
中图分类号:P627;P618.51
引用信息:
[1]吴浩,徐元进,范高晶,等.奇异值分解在ETM~+遥感蚀变信息提取中的应用——以青海省五龙沟金矿勘查区为例[J].地理与地理信息科学,2016,32(02):40-45+2.
基金信息:
国家自然科学基金项目(41072246);; 中央高校基本科研业务费专项资金资助项目(CUG120116);; 中国地质调查局青海专项基金“青海省东昆仑典型金矿床成矿控制条件与找矿方向综合调查(12120114000701)”
2016-03-15
2016-03-15