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	绿洲一荒漠交错带典型裸露地表的光谱特征
其他题名	Spectral Signature of Typical Bare Surface in Oasis-desert Crisscross
	张微 1; 姚琪 2; 张波 1; 房世峰 3
来源期刊	水土保持通报
ISSN	1000-288X
出版年	2017
卷号	37 期号:2 页码:177-182
中文摘要	[目的]对绿洲一荒漠交错带典型裸露地表光谱特征进行分析,为荒漠化治理和防沙治沙提供参考。[方法]利用典型裸露地表的实测数据,通过若干典型裸露地表类型的原始光谱、倒数取对数光谱、一阶导数光谱和包络线除去光谱对比,分析各类地物识别的特征光谱区间。为了后续更好地利用高分一号影像研究荒漠地区,选取蓝光、绿光、红光和近红外波长范围内的光谱进行进一步的分析,并利用各波段反射率结果分别计算改进的归一化光谱指数(NDSI)、简单比值指数(SR)和光谱差值商指数(SDI)等光谱指数。通过分析各类地物的光谱特征、光谱指数等,对各地物进行了区分。[结果]几类裸露地表的光谱差异性不大,可见光到近红外均为缓慢增加;一阶导数变换、倒数取对数和包络线去除光谱可以放大各地物间的差异性,可以区分几类典型裸露地表。[结论]利用原始光谱和变换后光谱计算的光谱指数差异性强,通过一阶导数变换的SDI可以较好地将各类典型裸露地表区分开。
英文摘要	[Objective] The measured spectra data of several typical bare surfaces were analyzed such to provide references for desertification prevention and control. [Methods] Methods of spectral analysis as moving average, reciprocal take logarithm(RLR) reflectance, first derivative transformation(FDR) and continuum removal(CR) were used to identity the sensitive band range of each ground feature. The paper aimed to explore the application of GF-1 and other extended use of that. The spectral indexes, such as normalized difference index(NDSI),simple ratio index(SR), spectral difference entropy index(SDI) were used to separate each other. [Results] Differences of the original spectral signatures among several bare surfaces were small. Spectral reflectance transited slowly from invisible value to near-infrared one, but the rate of increasing was different among each ground feature. The differences among bare surfaces could be magnified by first order derivative transformation, reciprocal logarithm transformation and continuum removal spectra. The effectiveness of transformation was all better than original spectrum. [Conclusion] Because the calculated difference was magnified between the original and the transformed spectral index, the first order derivative transformed SDI can distinguish the surface features much better.
中文关键词	裸露地表 ; 盐结皮 ; 绿洲一荒漠交错带 ; 光谱反射率 ; 包络线去除
英文关键词	bare surface salt crust oasis-desert crisscross spectral reflectance continuum removal
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:5986151
来源机构	中国科学院地理科学与资源研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236624
作者单位	1.浙江国时卫星科技有限公司, 杭州, 浙江 311113, 中国; 2.中国地震台网中心, 北京 100045, 中国; 3.中国科学院地理科学与资源研究所, 北京 100101, 中国
推荐引用方式 GB/T 7714	张微,姚琪,张波,等. 绿洲一荒漠交错带典型裸露地表的光谱特征[J]. 中国科学院地理科学与资源研究所,2017,37(2):177-182.
APA	张微,姚琪,张波,&房世峰.(2017).绿洲一荒漠交错带典型裸露地表的光谱特征.水土保持通报,37(2),177-182.
MLA	张微,et al."绿洲一荒漠交错带典型裸露地表的光谱特征".水土保持通报 37.2(2017):177-182.